ML20149G860
| ML20149G860 | |
| Person / Time | |
|---|---|
| Site: | Paducah Gaseous Diffusion Plant |
| Issue date: | 07/11/1997 |
| From: | NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | |
| Shared Package | |
| ML20149G840 | List: |
| References | |
| NUDOCS 9707240102 | |
| Download: ML20149G860 (3) | |
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NUCLEAR REGULATORY COMMISSION,
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Julyfil.1997
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DOCKET: -
70-7001 5
4 CERTIFICATE HOLDER:
' United States Enrichment Corporation.
i Paducah Gaseous Diffusion Plant
-l Paducah, KY
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SUBJECT:
' CERTIFICATION EVALUATION REPORT: APPLICATION -
DATED MARCH 17,1997, AS REVISED JUNE 19,1997, NUCLEAR MATERIAL CONTROLS AND ACCOUNTABILITY t
SCALE USAGE 1
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L By letter dated March 17,1997,' the United States Enrichment Corporation (USEC)
I requested an amendment to the Certificate of Compliance for the Paducah Gaseous-Diffusion Plant (PGDP). The request is to revise the Technical Safety Requimments (TSRs)
. concerning the Nuclear Material Control and Accountability (NMC&Al scales used for
.l verification of. UF. cylinder weight. By letter dated May 20,1997, the staff requested additionalinformation. 'USEC responded to the request by lettar dated June 19,1997.
1 D1RCUSSJDN USEC has proposed to revise TSRs 2.1.-4,21, 2.2.4.12, and 2.3.4,23 concerning the NMC&A scales used for verification of UFi cylinder weight. Ths cylinder weight is verified prior to heating the cylinder to prevent heating an overfilled cylinder. Currently, the TSRs 4
are wthten in a manner that specific scales must be used for verification of ufo weight.
The C-360 scales must be used for the pre-heat weighing in the sampling facility, the feed facility scales must be'used for pre-heat weighing in the feed facility, and the withdrawal facility scales can not be used for the pre; heat weighing. The proposed revision would-allow the pre-heat weight verificadon tc occur on any operable accountability scale, as long as the scale has been calibrated in the appropriate range and tolerance for the item being weighed. With the proposed change, USEC would be able to use the C-360 scales for the pre-heat weighing for both the sampling and feed facilities, the feed facility scales for the i
pre: heat weighing for the feed or sampling facilities, and the withdrawal f acility scales could be used.for the pre-heat weighings for the feed or sampling facility. This revision will
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provide operational flexibility if one of the NMC&A. scales at a fecility is' declared -
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inoperable. There is no change in the scale usage for the pre-fill cylinder weight and the
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cylinder fill, limit;
' Tna propoi d revision to the TSRs will not change the accident scenario of concern which se
.is to heat an overfilled cylinder. The proposed changes merely al!ow the cylinder to'bn '
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' weighed on any operable NMC&A scale, as long as the scale has been calibrated in the
' appropriate range; ' The same level of rigor is appl:ed to the weighing process regardless of
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- what scale'is used to weign the cylinder. The probability of heating an overfilled cylinder is o
.not increased.10SEC has also proposed chnges to the SAR to clarify that weighing can 4
1 N707240102 970715 N
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occur on any operable accountability scale that has ocen calibrated to an adeq'Jate range and tolerance for the item being weighed.
ENVlflONMENTALf1EWEW.
Issuance of an amencment to Certifbate of Comphance GDP-1 to revise the TSRs to allow any operable accountablilty scale to be used for pre-heat weight verification is subject to the categorical exclusion provided in 10 CFR 51.2?(cH19). Therefore, neither an environmental assessment nor an environmental impact statement is required for the proposed action.
CDMCLU.S1QN Obtaining pre-heat neight verification is extremely important to prevent heating an overfilled cyiinder. As long as the scale to be used has been calibrated in the appropriate range, there is no benefit to specifying the specific scale in the TSR. The proposed TSR will provide operational fMmbdity while still providing the necessary safety function of pre-heat weight verification. The staff recommends that the TSR and associated SAR changes be approved.
The Region 111 Inspection staff has ao objectjon to this proposed action.
1 EtincinaLCsatribuo2c Merci Hom i
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2 occur on any operable accountability scale that has been calibrated to an adequate range and tolerance for the item being weighed.
J ENVIRONMENTAL REVIEV.
Issuance of an amendmer. to Certificate of Compliance GDP-1 to revise the TSRs to allow any operable accountab'lty scale to be used for pre-heat weight verification is subject to i
the categorical exclusion provided in 10 CFR 51.22(c)(19). Therefore, neither an environmental assessment nor an environmental impact statement is required for the j
proposed action.
CONCLUSION
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Obtaining pre-heat weight verification is extremely important to prevent heating an i
overfilled cylinder. As long as the scale to be used has been calibrated in the appropriate i
range, there is no benefit to specifying the specific scale in the TSR. The proposed TSR will provide operational flexibility while still providing the necessary safety function of pre-heat weight verification. The staff recommends that the TSR and associated SAR changes be approved.
The Region ill inspection staff has no objection to this proposed action.
l Princioal Contributor i
Merri Horn l
plSTRIBUTION: (Control No.100M)
Docket 70-7001 NRC File Center PUBLIC Rlli KO'Brien, Rill NMSS r/f NMSS dir. ofc. r/f FCSS r/f FCOB SPB r/f PHiland, Rill f
gSPB h
SPL,
SPBA OFC SPB C
NAME Horn:ij Hoadley tin R
on DATE
() /3/97 N h97 7 [i97 9 / /97 C = COVER E = COVER & ENCLOSURE N = No COPY OFFICIAL RECORD COPY j
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