ML20032B146
| ML20032B146 | |
| Person / Time | |
|---|---|
| Site: | 07000754 |
| Issue date: | 10/21/1981 |
| From: | Page R NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Rouse L NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| NUDOCS 8111040620 | |
| Download: ML20032B146 (2) | |
Text
.
p ces i o / > 3 [8 /
Distribution:
34 CS (DocketFile70-754 g
g y.
,q
-+ -
~
O I4t$S rf
(
l FCUP rf NKetzlach (2)
OCT 211981 LTyson WTCrow RGPage RTKratzke MEMORANDUM FDR:
L. C. Rouse, Chief Advanced Fuel and Spent Fuel 5
Licensing Branch
'r 7~
- 5),,
Division of Fuel Cycle and f,, R n, 7
c-
~
Material Safety
- -l OCT2 719815 -
4 v s ocm trum" C'/
FROM:
R. G. Page, Chief (CJ i?/
Uranium Fuel Licensing Branch w y/TN.N/
Division of Fuel Cycle and
\\C M ' ). -
Material Safety 4
SUBJECT:
REVIEW 0F LICENSE APPLICATION DATED SEPTEMBER 2,1981 AND ITS SUPPLEMENT DATED SEPTEMBER 25, 1981, DOCKET NO.70-754 I.
Background
The General Electric Company (GE), by application dated September 2,1981, and its supplement dated September 25, 1981, requested authorization for the following at its Vallecitos Nuclear Center:
1.
Add a definition for a "subcritical area" to the definitions iti its license conditions section. Appendix A.
2.
Exemption from the criticality alarm requirements of 10 CFR 70.24(a) in "suberitical areas."
At your request, we have made a nuclear criticality safety review of the license amendment application.
II. Discussion GE has defined a "subcritical area" as a physically identified area or ing special r.uclear matenf als in quantities less than 500 g gation invgU, 300 g Pu, or a prorated combination of such materials 0, 300 g under the direction of a single area manager and which is unrelated to any other arm where special nuclear mate rials are handled. A suberitical area is considered unrelated when it meets the isolation requirements of Section 6.11(c) of the Appendix and is not in the same room.
Since a subcritical arca is under the direction of a single area manager, the manager can administratively control the maximum quantity of fissile material in the area. At the request of the MRC, GE has further defined an h'gt 1 20 011021
" " * ^ * * >
C K 07000734 PDR orrn y
..........l.....
-- "e-we24 NRC FORM 3t8 4tO BOIN9CM O2dC OFFICIAL RECORD COPY
r-v3[ ' ~
~ ;,,.
y q
q y
y 00T 211981
~
_c_
I unrelated subcritical area as one that meets the isolation requirements of Section 6.ll(c) of the Appendix and is not in the same room. This added restriction precludes the manager.' rom subdividing a large room into more than one subcritical area.
~ Psit 10 CFR 70.24(a) exempts the 11cen ee from the criticalty alarm re-Z35, 520 g quirements when the possession limitsis no more than 700 g 0
233, 450 g Pu, or 450 g of any combination thereof. Although the licensee's 0
possession limit for single fissile isotopes in a subcritical area is 1Es than that specified in Part 70.24(a), the combination of fissise isotopes may be more than allowed (500 g vs. 450 g). However, the prorated combination of fissile isotopes requested in a subcritical arca is farther from critical than the allowable 450 g of any combination of fissile isotopes. The isolation criteria between suberitical areas are adequate to prevent the accumulation of potentially critical quantities of fissile material in a single subcritical area. Therefore, the nuclear criticality safety controls provide an adequate margin of safety for the protection of the health and safety of the operating personnel, the public, and the environment.
orWnal Signed W Ralph G. Page R. G. Page, Chief Uranium Fuel Licensing Branch Division of Fuel Cycle and Material Safety 4
l l
i I
f l
1
)
"'c ' >. f.C,U, t
,,,,,FCU F,,,qp,
,,,f,,CU,P, gq
$~~>
. NKe,
,,a,,, : rad,,,LTyso,ri,,,
W
,,, T,Q,r.ow
,,,,,,,,,,,,,j om) 10/20/81 10/p/81 10/p//81 51 NPC FORM 31t$ 610.80) NRCM O240 OFFICIAL RECORD COPY
- * 'se%22se24i