ML20127A244

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Forwards Request for Addl Info Re Util Request for Change in Min Boron Concentration Required During Refueling Periods. Response Requested within 45 Days of Ltr Receipt
ML20127A244
Person / Time
Site: Rancho Seco
Issue date: 06/13/1985
From: Stolz J
Office of Nuclear Reactor Regulation
To: Reinaldo Rodriguez
SACRAMENTO MUNICIPAL UTILITY DISTRICT
References
NUDOCS 8506210071
Download: ML20127A244 (3)


Text

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- .', JUN 131985 Did-ot6 l

Docket No. 50-312 DISTRTRUTIM CDocket File) ACRS-10 NRC PDR RIngram SMiner L PDR

Mr. Ronald J. Rodriguez ORB #4 Rdg Gray File Executive Director, Nuclear HThompson EBrach Sacramento Municipal Utility District 0 ELD H0rnstein 6201 S Street EJordan JPartlow P. O. Box 15830 BGrimes Sacramento, California 95813

Dear Mr. Rodriguez:

SUBJECT:

BORON CONCENTRATION DURING REFUELING The staff is conducting its review of your request for a change in the minimum boron concentration required during periods of refueling. Based on our review as of this date, we have identified the need for additional information as listed in the enclosure. It is requested thet you provide this information within 45 days of receipt of this letter.

The reporting and/or recording keeping requirements contained in this letter affect fcwer than ten respondents, therefore OMB clearance is not required under P.L.96-511.

Sincerely,

%..-... - . - .-- a s JVM 7. sWW John F. Stolz, Chief Operating Reactors Branch #4 Division of Licensing

Enclosure:

Request for Additional Information cc w/ enclosure:

See next page ORBf4:0 ~

Bli:DL SMiner,; JS 6/jyl85 6/ G 5 B506210071 850613 PDR ADOCK 05000312 P PDR

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Mr. R. J. Rodriguez Sacramento Municipal Utility District Rancho Seco Nuclear Generating Station cc:

Mr. David S. Kaplan, Secretary Sacramento County and General Counsel Board of Supervisors Sacramento Municipal Utility 827 7th Street, Room 424 District Sacramento, California 95814 6201 S Street P. O. Box 15830 Ms. Helen Hubbard Sacramento, California 95813 P. O. Box 63 Sunol, California 94586 Thomas Baxter, Esq.

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

Washington, D.C. 20036 Mr. Robert B. Borsum Babcock & Wilcox Nuclear Power Generation Division Suite 220, 7910 Woodmont Avenue Bethesda, Maryland 20814 Resident Inspector / Rancho Seco c/o U. S. N. R. C.

14410 Twin Cities Road Herald, California 95638 Mr. John B. Martin, Regional Administrator U.S. Nuclear Regulatory Commission, Region V 1450 Maria Lane, Suite 210 Walnut Creek, California 94596 Director Energy Facilities Siting Division Energy Resources Conservation &

Develormuent Consnission 1516 - 9th Street Sacramento, California 95814 Mr. Joseph 0. Ward, Chief Radiological Health Branch State Department of Health Services 714 P Street, Office Building #8 Sacramento, California 95814 Mr. Joseph Findaro California State Office 444 North Capitol Street, N.W., Suite 305 Washington, D.C. 20003 e - - , - - e _

s ENCLOSURE REQUEST FOR ADDITIONAL INFORMATION RELATING TO PROPOSED LICENSE AMENDMENT NO. 126 REFUELING BORON CONCENTRATION RANCHO SECO NUCLEAR GENERATING STATION DOCKET NO.: 50-312

1. Your submittal of March 18, 1985 states that a boron concentration of 1974 ppm will "... sustain a reactivity condition of Keff = 0.95 or less with all control rods removed from the core." (underlining added).

Neither the Rancho Seco Updated Safety Analysis Report (containing nuclear data for Cycle 6) or the Reload Report for Cycle 7, however, provide a basis for confirming the correctness of this concentration.

Therefore, please provide a copy of the analysis that resulted in this estimate. If the analysis utilizes information from reference documents, please provide applicable extracts from the references.

2. If your review of the information needed for this submittal should reveal an error in the analysis that would increase the required concentration, please provide an appropriate revision to your request and to LER 85-03.

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