ML18040A095

Forwards Response to NRC 930722 RAI Addressing Util 921217 Submittal for Svc Level a & B Loadings & Util 930226 Submittal for Svc Level C & D Loadings,In Ref to GL 92-01, Reactor Vessel.... Calculation in Central Files

ML18040A095
Person / Time
Site:	Nine Mile Point
Issue date:	09/08/1993
From:	Sylvia B NIAGARA MOHAWK POWER CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML17059A032	List: ML17059A031 ML18040A095
References
GL-92-01, GL-92-1, NMP1L-0779, NMP1L-779, TAC-M83486, NUDOCS 9309140272
Download: ML18040A095 (4)

Text

ACCELERATFD DOC'UMEYT DISTR. 8UTION SYS'1'EM REGULA Y INFORMATION DISTRIBUTIO YSTEM (RIDS)

ACCESSION NBR:9309140272 DOC.DATE: 93/09/08 NOTARIZED: NO DOCKET FACIL:50-220 Nine Mile Point Nuclear Station, Unit 1, Niagara Powe 05000220 AUTH. NAME AUTHOR AFFILIATION SYLVIA,B.R. Niagara Mohawk Power Corp. tI'~oW~

RECIP'.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Forwards response to NRC 930722 RAI addressing util 921217 I submittal for Svc Level A a B loadings 6 util 930226 submittal for Svc Level C 6 D loadings,in ref to GL 92-01, D "Reactor Vessel Structural Integrity."

DISTRIBUTION CODE: R028D TITLE: Generic Letter 92-01 COPIES RECEIVED:LTR Responses

( ENCL Q SIZE:

(Reactor Vessel Structural Integrity 1 NOTES:

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD1-1 PD 1 1 BRINKMAN,D. 2 2 INTERNAL: ACRS 6 6 NRR/DE/EMCB 2 2 D NRR/DORS/OGCB 1 1 NRR/DRPE/PDI-1 1 1 NRR/DRPW 1 1 NUDOCS-ABSTRACT 1 1 CARD B 1 0 OGC/HDS1 1 0 REG FIL 01 1 1 RES/DE/MEB 1 1 EXTERNAL: NRC PDR 1 ljl/$ NSIC 1 14P D

D NOTE TO ALL"RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE! CONTACT TIIE DOCUMEN'I'ON'I'I<OLD)"SK, ROOM Pl-37 (EXT. 504-2065) TO ELIMINATEYOUR NAME FROM DISCI'RIBU'I'ION LISTS FOR DOCUMENTS YOU DON'T NEED!

TOTAL NUMBER OF COPIES REQUIRED: LTTR 21 ENCL 19

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V HIIAS A U MCjNIAWK NIAGARAMOHAWKPOWER CORPORATION/NINE MILE POINT, P.O. BOX 63, LYCOMING, NY 13093/TELEPHONE (315) 349-2882 B. Ralph Sylvia Executive Vice President September 8, 1993 Nuclear NMP1L 0779 U. S. Nuclear Regulatory Commission

Attn'. Document Control Desk; Washington, D.C. 20555 Re

Nine Mile Point Unit 1 Docket No. 50-220 DPR-63 TA N M 4

SUBJECT:

GENERIC LETTER 92-01, REVISION 1, REACTOR VESSEL STRUCTURAL INTEGRITY, REQUEST FOR ADDITIONALINFORMATION

'Gentlemen:

By letters dated December 17, 1992 (NMP1L 0723) and February 26, 1993 (NMP1L 0739),

Niagara Mohawk provided elastic-plastic fracture mechanics assessments for Nine Mile Point Unit 1 beltline plates for Service Level A and B loadings and Service Level C and D loadings, respectively. These reports demonstrate that a margin of safety exists against fracture equivalent to that required by Appendix G of ASME Code Section III, for beltline plates having upper-shelf energy values below the screening criterion of 50 ft-lb. By letter dated July 22, 1993, the NRC Staff requested that Niagara Mohawk submit additional information for each of the above submittals, as identified in Enclosures 1 and 2 of their letter.

Enclosed is Niagara Mohawk's response to the Staff's July 22, 1993 request for additional information. The Enclosure 1 responses address our December 17, 1992 submittal for Service Level A and B loadings and the Enclosure 2 responses address our February 26, 1993 submittal for Service Level C and D loadings.

Very truly yours, B. Ralph Sylvia Exec. Vice President-Nuclear AER/mls 004283GG Enclosure I pp pc: Mr. T. T. Martin, Regional Administrator 'l51~ C Mr. R. A. Capra, Director, Project Directorate I-1, NRR Mr. D. S. Brinkman, Senior Project Manager, NRR Mr. W. L. Schmidt, Senior Resident Inspector

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