ML19350D194

Requests Addl Info to Complete Review of Cycle 5 Reload Rept.Util Must Indicate Exclusion Area Boundary & Low Population Zone Doses to Thyroid & Whole Body Considering Max Hypothetical Accident

ML19350D194
Person / Time
Site:	Rancho Seco
Issue date:	04/06/1981
From:	Stolz J Office of Nuclear Reactor Regulation
To:	Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT
References
NUDOCS 8104130734
Download: ML19350D194 (3)

Text

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49 UNITED STATES

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E WASHINGTON, D, C. 20555

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April 6,1981 Docket No. 50-312 o

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~af3 Mr. J. J. Mattimoe 2

Ap 4,. %. O Assistant General Manager and

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E Sacramento, California 95813

SUBJECT:

CYCLE 5 RELOAD Additional information is required so that we can complete our review of your Cycle 5 reload report. Please indicate the EAB and LPZ doses to the thyroid and whole body considering:

1) Steam line failure outside the reactor building

2) Steam generator tube failures with loss of offsite power 3)

Fuel handling accident

4) Control rod injection

5) Loss-of-coolant accident

6) Maximum hypothetical accident The dose analysis need not be submitted at this time, but will be required later.

We have previously stated that fuel rod bowing must be accounted for before we approve your reload. An acceptable method to account for rod bowing is to change the minimum DNBR value in your Technical Specifications (TS) to 1.36 or greater. Pleate submit the TS change to us or propose other equivalent compensatory action. The TS change should include a basis that indicates the 1.0% DNBR generic credit from use of a flow area reduction factor and a 4.6% DNBR plant specific credit have been taken to produce the minimum DNBR value of 1.36.

NRC approval of your reload will be delayed until resolution of these matters.

, Sincerely, LU John' F. Stolz, Chief Operating Reactors Branch #4 ivision of Licensing cc: See next page P

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Sacramento Municipal Utility Rancho Seco, Docket No. 50-312 District cc w/ enclosure (s):

David S. Kaplan, Secretary and Christopher Ellison, Esq.

General Counsel 6201 S Street Dian Grueufch, Esq.

California Energy Commission P. O. Box 15830 1111 Howe Avenue Sacramento, California 95813 Sacramento, California 95825 Sacramento County Ms. Eleanor Schwartz Board of Supervisors California State Office 827 7th Street, Room 424 600 Pennsylvania Avenue, S.E., Rm. 201 Sacramento, California 95814 Washington, D. C.

20003 Business and Municipal Department Docketing and Service Section Sacramento City-County L.ibrary Office of the Secretary 828 I Street U.S. Nuclear Regulatory Commission Sacramento, California 95814 Washington, D. C.

20555 Resident Inspcctor/ Rancho Seco Director, Criteria and Standards c/o U. S. N. R. C.

Division 14410 Twin Cities Road Office of Radiation Programs (ANR-460)

Herald, CA 95638 U. S. Environmental Protection Agency Washington, D. C.

20460 Dr. Rir.hard F. Cole Atomic Safety & Licensing Board Panel U.S. Nuclear Regulatory Commission U. S. Environmental Protection Agency Washington, D. C.

20555 Region IX Office 3

ATTN:

EIS C0ORDINATOR Mr. Frederick J. Shon 215 Fremont Street Atomic Safety and Licensing Board San Francisco, California 94111 Panel U.S. Nuclear Regulatory Commission Mr. Robert B. Borsum Washington, D. C.

20555 Babcock & Wilcox Nuclear Power Generation Division Elizabeth S. Bowers, Esq.

Suite 420, 7735 Old Georgetown Road Chairman, Atomic Safety and Bethesda, Maryland 20014 Licensing Board Panel U.S. Nuclear Regulatory Commission Thomas Baxter, Esq.

Washington, D. C.

20555 Shaw, Pittman, Potts & Trowbridge 1800 M Street, N.W.

Mr. Michael R. Eaton Washington, D. C.

20036 Energy Issues Coordinator Sierra Club Legislative Office Herbert H. Brown, Esq.

1107 9th Street, Room 1020 Lawrence Coe Lanpher, Esq.

Sacramento, California 95814 Hill, Christopher and Phillips,7.C.

1900 M Street, N.W.

Atomic Safety and Licensing Board Washington, D. C.

20036 Panel i

U.S. Nuclear Regulatory Commission Helen Hubbard Washington, D. C.

20555 P. O. Box 63 Sunol, California 94586

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ji Sacramento Municipal Utility (I District Atomic Safety and Licensing Appeal h-Board Panel

'l U.S. Nuclear Regulatory Commission j

Washington, D. C.

20555 l

1 0i California Department of Health ATTN: Chief. Environmental Radiation Control Unit i

Radiological Health Section 714 P Street, Room 498 Sacramento, California 95814 c

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