2013/134632 MASTER REGISTER OF NUCLEAR SITE LICENCES: UPDATED APRIL 2015 (including licensing exemptions under NIA65 s.1(2)) Licence Numbering 1. The next available site licence number is issued: (a) when a site is licensed for the first time, or (b) when an existing licensed site is relicensed to a different corporate body. 2. Where a replacement licence is granted to the corporate body already holding the licence for that site, the new licence will carry the existing licence number but with the addition of an alphabetical suffix. For example licence 30 was succeeded by licence 30A, then licence 30B etc. etc. Abbreviations Att. – Attachment of licence condition(s) under sections 4(1), 4(3) and 4(4) of NIA65 V. – either: (a) a Variation under s.4(5) of NIA65 of the conditions attached to the licence or (b) a Variation granted under s.3(12) of NIA65 to exclude part of the site which the licensee no longer needs for prescribed activities and for which it has demonstrated ‘no danger’ from ionising radiations to the satisfaction of ONR. NUCLEAR SITE LICENCES: ENGLAND AND WALES LICENCE NO: SITE TITLE AND LOCATION (Grid Reference) LICENSEE and Registered Office GRANTED IN FORCE REVOKED / SURRENDERED NOTES 1 Merlin Reactor Aldermaston Court, Aldermaston Reading, Berkshire Associated Electrical Industries Ltd 33 Grosvenor Place London SW1 25.03.60 01.04.60 31.12.63 2 Jason Reactor Sutton Lane, Langley Slough, Bucks (TQ 022 788) Hawker-Siddeley Nuclear Power Company Ltd Sutton Lane, Langley, Slough, Bucks 25.03.60 V1. 12.12.60 V2. 31.01.61 01.04.60 12.12.60 31.01.61 18.01.62 3 Berkeley NPS and Berkeley Nuclear Laboratories Berkeley Gloucestershire GL13 9PA (ST 659 994) Central Electricity Generating Board (CEGB) Sudbury House 15 Newgate Street London EC1 30.3.60 V1. 05.07.60 V2. 07.07.61 V3. 15.02.62 V4. 03.06.64 A. 17.01.66 B. 08.12.67 V1. 28.08.70 1.4.60 05.07.60 10.07.61 19.02.62 08.06.64 17.01.66 08.12.67 28.08.70 17.1.66 08.12.67 30.06.71 NSL 3 – Berkeley NPS only NSL 3A – Berkeley NPS and Nuclear Laboratories
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2013/134632
MASTER REGISTER OF NUCLEAR SITE LICENCES: UPDATED APRIL 2015
(including licensing exemptions under NIA65 s.1(2))
Licence Numbering
1. The next available site licence number is issued:
(a) when a site is licensed for the first time, or
(b) when an existing licensed site is relicensed to a different corporate body.
2. Where a replacement licence is granted to the corporate body already holding the licence for that site, the new licence will carry the existing licence number but with the addition of an alphabetical suffix. For example licence 30 was succeeded by licence 30A, then licence 30B etc. etc.
Abbreviations Att. – Attachment of licence condition(s) under sections 4(1), 4(3) and 4(4) of NIA65
V. – either:
(a) a Variation under s.4(5) of NIA65 of the conditions attached to the licence or
(b) a Variation granted under s.3(12) of NIA65 to exclude part of the site which the licensee no longer needs for prescribed activities and for which it has demonstrated ‘no danger’ from ionising radiations to the satisfaction of ONR.
Imperial College of Science & Technology University of London Clerk to the Court & Council Imperial College of Science, Technology & Medicine Exhibition Road South Kensington London SW7 2AZ
NIA65 s3(6) variation excluded a small area of land (1,170 sq. ft.) to the north west of the re-actor building NSL 7B V7. to bring into effect Nuclear Safety Directive requirement (LC17&36) Changes to LC1/LC3
8 Dungeness NPS Dungeness Shepway Kent TN29 9PP
(TW 084 168)
Central Electricity Generating Board Bankside House Sumner Street London SE1 Sudbury House 15 Newgate Street London EC1
NIA65 s.3(6) variation excluded a parcel of land 32’ x 134’ 3” (4,296 sq. ft.) to the immedi-ate south of the reactor building NIA65 s.3(6) variation excluded a narrow strip of land 14.8m x 0.91m (13.5 sq. m) between the reactor / office building and the area deli-censed via Variation No.1 NIA65 s.3(6) variation excluded a narrow strip of land 0.47m x 40.96m (19.25 sq. m) along the northern edge of the offices NSL 13C V1. to bring into effect Nuclear Safe-ty Directive requirement (LC17&36). Changes to LC1/LC3
15 AEI Nuclear Research Associated Electrical 30.03.62 01.04.62 01.04.64
2013/134632
LICENCE NO:
SITE TITLE AND LOCATION (Grid Reference)
LICENSEE and Registered Office
GRANTED IN FORCE REVOKED / SURRENDERED
NOTES
Laboratories Wythenshawe Manchester
(SJ 803 887)
Industries Ltd 33 Grosvenor Place London SW1
V1. 07.1.64 07.01.64
16 Parsons Nuclear Research Laboratories Heaton Works Newcastle-upon-Tyne 6
(NZ 276 649)
C A Parsons & Co Ltd Heaton Works Newcastle-upon-Tyne 6
30.03.62 V1. 16.10.62
01.04.62 18.10.62
29.09.63
17 Vickers Test Rig Installations South Marston Works Swindon, Wiltshire
(SU 181 887)
Vickers Ltd Vickers House Millbank Tower, Millbank London SW1P 4QU
28.09.62 V1. 18.10.63 V2. 07.01.65
A. 01.04.65
V1. 27.03.68 B. 28.03.74
30.09.62 18.10.63 07.01.65
01.04.65
29.3.68 01.04.74
01.04.65 01.04.74 09.09.76
SL 17: Vickers-Armstrong Test Rig Workshops, Vickers-Armstrong (Engineers) Ltd, South Marston Works Swindon, Wiltshire SL 17A: Vickers Test Rig Workshops Vickers Ltd, Vickers House, Millbank Tower Millbank, London, SW1 NSL 17B replaced by NSL 39
18 IRD Nuclear Research Laboratories Heaton, Newcastle-upon-Tyne
(NZ 276 649)
International Research and Development Co Ltd Fossway Newcastle-upon-Tyne 6
26.09.63 V1. 15.11.63 V2. 27.3.68
30.09.63 15.11.63 29.3.68
18.07.75
Licence granted 26.9.63. N.B. Same site formerly licensed to C A Parsons under licence 16, which was revoked on 29.9.63. [map references (NZ 276 649) are the same]
19 Manchester University Research Reactor Risley, Warrington Cheshire WA3 6AT
(SJ 653 927)
Victoria University of Manchester Risley Warrington Cheshire WA3 6AT
NSL 25 V1: NIA65 s.3(6) variation excluded a strip of land along the eastern boundary of the site. N.B. This variation was granted only 5 months after the site was first licensed. replaced by NSL 59
26 Heysham NPS Heysham Lancashire LA3 2XQ
(SD 400 597)
Central Electricity Generating Board Sudbury House 15 Newgate Street London EC1
V1 to NSL 26: NIA65 s.3(6) variation exclud-ed an area of land at the north east corner of the site V2 to NSL 26: NIA65 s.3(6) variation excluded a small rectangular area of land set into the northern boundary of the site (this may be the area occupied by the dock company’s Klargesters, and about which there is
2013/134632
LICENCE NO:
SITE TITLE AND LOCATION (Grid Reference)
LICENSEE and Registered Office
GRANTED IN FORCE REVOKED / SURRENDERED
NOTES
B. 07.06.85 V1. 25.03.86 V2. 17.07.87
C. 12.8.87 D. 23.02.90
V1. 07.08.92
07.06.85 01.05.86 17.07.87
13.8.87 1.3.90
07.08.92
13.08.87 01.03.90 31.03.96
correspondence on the file for licence 60.) replaced by NSL 60
27 ICI Triga Reactor and Isotope Preparation Facility Research Reactor Billingham,Cleveland TS23 1JB
(NZ 466 226)
ICI Ltd Billingham, Teeside Cleveland TS23 1JB
26.02.71 A. 20.07.71
V1. 25. 02.80 V2. 10.12.84 V3. 03. 02.87
26.02.71 21.7.71
25.02.80 10.12.84 10.02.87
21.07.71 31.12.87
replaced by NSL 43
28 Capenhurst Works Capenhurst, Chester Cheshire, CH1 6ER
NIA65 s.3(6) variation excluded a small rectangular area of land to west side of road 7 * from 29/6/07. British Nuclear Group Sellafield Ltd from 1.4.05 to 28/6/7. Formerly British Nuclear Fuels plc NSL 28I: Licence Condition 3 amended with effect from 1.4.05 by section 4(3) variation NSL 28J V1. to bring into effect Nuclear Safe-ty Directive requirement (LC17&36).
2013/134632
LICENCE NO:
SITE TITLE AND LOCATION (Grid Reference)
LICENSEE and Registered Office
GRANTED IN FORCE REVOKED / SURRENDERED
NOTES
Capenhurst Works (28J) has been taken over by Urenco - NSL 48E.
29 Drigg Storage Site Drigg Cumbria
(SD 053 992)
British Nuclear Group Sellafield Limited * 1100 Daresbury Park Daresbury, Warrington Cheshire WA4 4GB
NSL 30 No drawing attached to variation NSL 30G NIA65 s.3(6) variation excluded an area at SE corner of site, bounded by Deepdale Lane and Lea Lane, which is occupied by the Flutec plant replaced by NSL 79
31 Sellafield (Windscale Works and Calder Works) Seascale Cumbria CA20 1PG
British Nuclear Fuels Ltd Risley, Warrington Cheshire WA3 6AS
17.04.75 21.04.75 29.03.76 Replaced NSL 36
38 Cardiff Laboratories The Maynard Centre Whitchurch, Cardiff South Glamorgan CF14 7YT
(ST 133 812)
GE Healthcare Ltd * (Company No. 01002610) Amersham Place Little Chalfont Bucks HP7 9NA
29.03.76 A. 18.10.79
V1.08.10.82 V2.09.09.87
B. 2.7.90 V1. 21.07.11 V2. 25.09.14 C.24.4.15
01.04.76 22.10.79
28.10.82 14.09.87
2.7.90 22.07.11 01.10.14 C.1.5.15
22.10.79 02.07.90
* from 12.2.05: formerly Amersham plc (from 12.7.01) formerly Nycomed Amersham plc (from 22.10.97); formerly Amersham International plc. NSL 38A V? : NIA65 s.3(6) variation excluded area at SW corner, designated on plan “Rec. Soc. Area” (area roughly equilateral triangle with sides of 100 metres). NSL 38B V1. to bring into effect Nuclear Safety Directive requirement (LC17&36). Changes to LC1/LC3
39 Vickers Test Rig Installation Fissile Material South Marston, Swindon Wiltshire
(SU 181 889)
Vickers Ltd Vickers House, Millbank Tower Millbank, London SW1P 4QU
23.11.77 A. 10.5.78
V1. 28.07.78
30.11.77 15.5.78
28.07.78
15.05.78 08.07.81
NSL39A: NIA65 s.3(6) variation excluded part of the ‘General Workshop’ adjacent to the test rig, measuring 50’ x 82’ (4,100 sq. ft). [N.B. It appears the previous licence (NSL 17) for the same site, in Vickers’ name, was surrendered on 9.9.76.
40 Sellafield (Waste Treatment Complex)
(NY 029 038)
British Nuclear Fuels plc Risley, Warrington Cheshire WA3 6AS
18.04.84 250.4.84 28.04.87 replaced by NSL 31C
41 Devonport Dockyard Fuel Storage and Handling
(SX 444 226)
Devonport Management Ltd Devonport Royal Dockyard Devonport, Plymouth PL1 4SR
03.04.87 06.04.87 06.03.97 replaced by NSL 50
42 Devonshire Dock Complex Barrow-in-Furness Cumbria LA14 1AF
BAE Systems Marine Ltd * (Company No. 00229770) Warwick House, PO Box 87, Farnborough Aerospace Centre
30.07.87 A. 25.09.90 B. 29.10.90
01.08.87 27.09.90 01.11.90
27.09.90 01.11.90
from 23.2.00: formerly Marconi Marine (VSEL) Limited
2013/134632
LICENCE NO:
SITE TITLE AND LOCATION (Grid Reference)
LICENSEE and Registered Office
GRANTED IN FORCE REVOKED / SURRENDERED
NOTES
(SD 191 690) Farnborough, Hampshire GU14 6YU
V1. 17.07.96 V2. 21.07.11 V3. 25.09.14
17.07.96 22.07.11
01.10.14
NSL 42B V2. to bring into effect Nuclear Safety Directive requirement (LC 17&36). Changes to LC1/LC3
43 Triga Reactor and Isotope Preparation Facility Research Reactor, Billingham Cleveland TS23 1JB
(NZ 466 226)
ICI Chemicals & Polymers Ltd PO Box 13, The Heath Runcorn, Cheshire WA7 4QF
30.12.87 V1. 13.01.94
01.01.88 24.01.94
25.11.05 Replaced NSL 27A NSL43 was revoked on 25.11.2005 on satis-faction of HSE criterion for ‘no danger’
44 Harwell Harwell, Didcot Oxfordshire 0X11 0RA
(SU 477 869)
United Kingdom Atomic Energy Authority The Secretary, The Manor Court Chilton, Oxfordshire, OX11 0RN
17.10.90 V1. 21.05.92 V2. 24.03.05 V3. 29.09.06
31.10.90 21.05.92 01.04.05 30.09.06
02.02.09 NSL 44 V1: NIA65 s.3(6) variation NSL 44 V2: LC 3 amended with effect from 1.4.05 by section 4(3) variation NSL 44 V3: NIA65 s.3(6) variation
45 Springfields Works Salwick, Nr Preston Lancashire PR4 0XJU
(SD 474 315)
United Kingdom Atomic Energy Authority Harwell Business Centre, Didcot, Oxfordshire OX11 0RA
17.10.90 31.10.90 01.11.94
46 Windscale Windscale, Seascale Cumbria CA20 1PF
(NY 028 043)
United Kingdom Atomic Energy Authority The Secretary, Marshall Building 521 Downs Way, Harwell Oxfordshire, OX11 0RA
17.10.90 A. 30.03.94 B. 9.10.02
V1.24.03.05
31.10.90 01.04.94 16.10.02
01.04.05
01.04.94 16.10.02 31.03.08
NSL 46B V2: LC 3 amended with effect from 1.4.05 by section 4(3) variation
United Kingdom Atomic Energy Authority The Secretary, The Manor Court Chilton, Oxfordshire, OX11 0RN
17.10.90 V1. 16.11.01 V2. 24.03.05
31.10.90 01.12.01 01.04.05
02.02.09 NSL 47 V1: NIA65 s.3(6) variation excluded 2 areas as part of delicensing programme. V2: LC 3 amended with effect from 1.4.05 by section 4(3) variation
48 Capenhurst Works Capenhurst, Chester Cheshire, CH1 6ER
C. 06.02.04 D. 05.07.10 V1 21.07.11 E.26.11.12 V1. 25.09.14
10.02.04 07.07.10 22.07.11 30.11.12 01.10.14
07.07.10 30.11.12
NSL 48D V1. to bring into effect Nuclear Safety Directive requirement (LC17&36) NSL 48E incorporates the former Sellafield site (formally NSL 28J).d Changes to LC1/LC3
49 Nuclear Fuel Production Plant Raynesway Derby (SK 380 349)
06.03.97 A. 24.03.00 B. 25.10.02 V1. 21.07.11 V2. 25.09.14
06.03.97 01.04.00 01.11.02 22.07.11 01.10.14
01.04.00 01.11.02
Replaced NSL 41. Small area delicensed via the revocation of NSL 50 and the grant of NSL 50A, DRDL having demonstrated ‘no danger’ for the area being delicensed NSL 50B V1. to bring into effect Nuclear Safety Directive requirement (LC17&36). Changes to LC1/LC3
51 Sizewell A Power Station Leiston Suffolk IP16 4UE
(TM 648 263)
Magnox Electric Limited (Company No. 02264251) Berkeley Centre, Berkeley Gloucestershire, GL13 9PB
25.03.96 V1. 24.03.05
01.04.96 01.04.05
30.09.08 Replaced NSL 12D. V1: LC 3 amended with effect from 1.4.05 by section 4(3) variation Replaced by NSL 90
52 Hinkley Point A Power Station Bridgewater Somerset TA5 1YA
(ST 210 461)
Magnox Electric Limited (Company No. 02264251) Berkeley Centre, Berkeley Gloucestershire, GL13 9PB
25.03.96 A. 24.06.98
V1. 24.03.05
01.04.96 26.06.98
01.04.05
26.06.98 30.09.08
Replaced NSL 5D. NSL 52A V1: LC 3 amended with effect from 1.4.05 by section 4(3) variation Replaced by NSL 89
53 Bradwell Power Station Bradwell-on-Sea, Southminster Essex CM0 7HP
(TM 001 088)
Magnox Electric Limited (Company No. 02264251) Berkeley Centre, Berkeley Gloucestershire, GL13 9PB
25.03.96 V1. 24.03.05
01.04.96 01.04.05
30.09.08 Replaced NSL 4A. V1: LC 3 amended with effect from 1.4.05 by section 4(3) variation Replaced by NSL 87
54 Berkeley Power Station and Magnox Electric plc 25.03.96 01.04.96 18.12.02 Replaced NSL 3E
2013/134632
LICENCE NO:
SITE TITLE AND LOCATION (Grid Reference)
LICENSEE and Registered Office
GRANTED IN FORCE REVOKED / SURRENDERED
NOTES
Berkeley Centre Berkeley Gloucestershire GL13 9PB
(ST 659 994)
Risley, Warrington Cheshire WA3 6AS
Replaced by NSL 70
55 Dungeness A Power Station Dungeness, Romney Marsh Kent, TN29 9PP
(TM 084 168)
Magnox Electric Limited (Company No. 02264251) Berkeley Centre, Berkeley Gloucestershire, GL13 9PB
25.03.96 V1. 24.03.05
01.04.96 01.04.05
30.09.08 Replaced NSL 8D. V1: LC 3 amended with effect from 1.4.05 by section 4(3) variation Replaced by NSL 88
56 Trawsfynydd Power Station Trawsfynydd, Blaenau Ffestiniog Gwynedd LL41 4DT
(SH 692 383)
Magnox Electric plc Risley, Warrington Cheshire WA3 6AS
25.03.96 01.04.96 18.12.02
Replaced NSL 6B. Replaced by NSL 72
57 Oldbury Power Station Oldbury Naite, Thornbury South Gloucestershire BS35 1RQ
Magnox Electric Limited (Company No. 02264251) Berkeley Centre, Berkeley Gloucestershire, GL13 9PB
66 Cardiff Laboratories The Maynard Centre, Whitchurch, Cardiff , CF14 7YT
NOT USED
Allocated in 1997 in the expectation that Amersham Pharmacia Biotech (UK) Ltd would apply to become the licensee, but change not pursued.
67 Sizewell A Power Station Leiston Suffolk IP16 4UE
NOT USED
68 Hinkley Point A Power Station
2013/134632
LICENCE NO:
SITE TITLE AND LOCATION (Grid Reference)
LICENSEE and Registered Office
GRANTED IN FORCE REVOKED / SURRENDERED
NOTES
Bridgewater Somerset TA5 1YA (ST 210 461)
NOT USED British Nuclear Fuels plc applied on 30.1.98. Relicensing was delayed pending completion of EA reauthorisation process. Subsequently BNFL decided not to proceed.
69 Bradwell Power Station Bradwell-on-Sea Southminster Essex CM0 7HP
NOT USED
70 Berkeley Power Station & Berkeley Centre Berkeley Gloucestershire GL13 9PB
British Nuclear Fuels plc 1100 Daresbury Park Daresbury, Warrington Cheshire, WA4 4GB
16.12.02 18.12.02 31.03.05
Replaced NSL 54 Replaced by NSL80
71 Dungeness A Power Station Dungeness Romney Marsh Kent TN29 9PP
NOT USED
BNFL applied on 30.1.98. Relicensing de-layed pending completion of EA authorisation process. Licence application withdrawn.
72 Trawsfynydd Power Station Trawsfynydd Blaenau Ffestiniog Gwynedd LL41 4DT
British Nuclear Fuels plc 1100 Daresbury Park Daresbury, Warrington Cheshire, WA4 4GB
16.12.02 18.12.02 31.03.05 Replaced NSL 56 Replaced by NSL81
73 Oldbury Power Station Oldbury Naite, Thornbury South Gloucestershire, BS35 1RQ
NOT USED
British Nuclear Fuels plc applied on 30.1.98. Relicensing was delayed pending completion of EA reauthorisation process. Subsequently BNFL decided not to proceed.
74 Wylfa Power Station Cemaes Bay Anglesey LL67 0DH
NOT USED
75 Springfield Works Uranium Fuel Manufacture Salwick Preston Lancashire PR4 OXJ
NOT USED
In early 1998 BNFL proposed a new subsidi-ary, to be jointly owned with Siemens, to take over BNFL Fuel Group activities at Spring-fields. A licensing file was set up, but the joint venture did not proceed.
See previous entry. The area operated by BNFL’s R&T division was to be excluded from licence 75, thus requiring a separate licence. See 1NUC145/1/74 P1E4.
Replaced NSL 46B NSL 83 V1. to bring into effect Nuclear Safety Directive requirement (LC17&36) Changes to LC1/LC3
84. Harwell Harwell, Didcot Oxfordshire 0X11 0RA
(SU 477 869)
Research Sites Restoration Limited (Company No. 05915837) Building 392.7, Room G06, Rutherford Ave, Didcot, Oxfordshire
21.1.09 V1. 17.03.11 V2.21.07.11 V3.14.12.11.
2.2.09 17.03.11 22.07.11 10.01.12
NSL 84 - revoked 30/4/12
Replaced NSL 44 Variation No 1 came into effect on 17.03.11 to relicense the Eastern Area Facility NSL 84 V2. to bring into effect Nuclear Safety Directive requirement (LC17&36).
2013/134632
LICENCE NO:
SITE TITLE AND LOCATION (Grid Reference)
LICENSEE and Registered Office
GRANTED IN FORCE REVOKED / SURRENDERED
NOTES
OX11 0DF NSL 84 V3 excluding land which is shaded purple on licensee drawing ref: HW/NLS84/33623_1.Replaced by NSL 99.
Replaced NSL 47 NSL 85 V1. to bring into effect Nuclear Safety Directive requirement (LC17&36). NSL 85 V2 excluding land which is shaded green on licensee drawing ref: Doc No. 10_1019(Issue 3) NSL 85 V3 excluding land which is shaded red on licensee drawing ref Doc No: 12_1007 (is-sue 2).-. Changes to LC1/LC3 Replaced by NSL 100.
86 Berkeley Berkeley Gloucestershire GL13 9PB
Magnox South Limited (Company No. 06005213) Berkeley Centre, Berkeley Gloucestershire, GL13 9PB
19.09.08 01.10.08 05.01.11 Replaced NSL 80. Replaced by NSL 92.
Research Sites Restoration Lim-ited (Company No 05915837) Building 392.7, Room G06, Rutherford Ave, Didcot, Oxfordshire OX11 0DF
23.04.12 V1. 15.07.14 V2 25.09.14
30.04.12 25.07.14 01.10.14
NSL 99 revoked 01/4/15
Replacement licence to take over bit site formally GE Healthcare Ltd – NSL 33A. NSL 99 V1. excluding land which is shaded brown on licensee drawing ref HW/NLS84/33623-1(Issue H). Changes to LC1/LC3 Replaced by NSL 101.
These instruments were granted by the Ministry of Power (later Ministry of Technology, then Trade and Industry) under the powers provided by s.1(2) of NIA65 and Reg. 4 of the Nuclear Installations regulations 1965 (SI 1965/1825).
Schedule 1 to the initial Exemption described the site as:
“An installation designed or adapted for the incorporation of uranium enriched so as to contain more than 0.72 per cent of the isotope 235, or plutonium, or any alloy or chemical compound of such uranium or plutonium, in a device designed to form part of a nuclear assembly or designed for irradiation in a nuclear reactor, being an installation situated within the Company’s premises at Banwell, Weston-super-Mare, Somerset......”
Schedule 2 to the Exemption required that:
“1. Subject to the following condition the Company shall not at any one time keep, store or process at the installation, or at the premises shown on the plan attached hereto for the purposes of the installation, fissile material in any form of a total weight exceeding such amount as the Minister may from time to time approve.
2. Of the total amount of fissile material approved by the Minister in pursuance of the previous condition not more than 30 grammes shall be in the form of plutonium and such plutonium shall be encapsulated and shall not be in either powder or liquid form.”
An Approval issued to British Aerojet on 16 May 1966 stated that:
“The Minister of Power, for the purposes of condition 1 of Schedule 2 to Nuclear Site Licence Exemption No.1, hereby approves, as the quantity of fissile material to be kept or processed at the installation, not more than 50 grammes.”