ML20197J939

Requests F Coffman Audit Mods to Facility Re Potential for Seismically Induced Sys Interaction Between in-core Flux Mapping Sys & Seal Table on 850709,per IE Info Notice 85-45. Util Will Have Calculation/Design Packages Available

ML20197J939
Person / Time
Site:	05000000, Diablo Canyon
Issue date:	07/01/1985
From:	Knighton G Office of Nuclear Reactor Regulation
To:	Thadani A Office of Nuclear Reactor Regulation
Shared Package
ML082840462	List: ML20197J561 ML20197J565 ML20197J706 ML20197J711 ML20197J756 ML20197J770 ML20197J799 ML20197J806 ML20197J819 ML20197J838 ML20197J887 ML20197J893 ML20197J911 ML20197J919 ML20197J925 ML20197J939 ML20197J949 ML20197J973 ML20197J987 ML20197J997 ML20197K022 ML20197K029 ML20197K052 ML20197K055 ML20197K065 ML20197K070 ML20197K126 ML20197K130 ML20197K136 ML20197K144 ML20197K155 ML20197K164 ML20197K170 ML20197K198 ML20197K221 ML20197K228 ML20197K243 ML20198A020 ML20198A192 ML20198A211 ML20198A219 ML20198A225 ML20198A249 ML20198A254 ML20198A262 ML20198A359 ML20198D828 ML20198G197 ML20198G219 ML20198G265 ... further results
References
FOIA-86-197 IEIN-85-045, IEIN-85-45, NUDOCS 8507110607
Download: ML20197J939 (1)

Text

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Docket No.:

50,323

$1 1 133' MEMORANDUM FOR:

Ashok C. Thadani, Chief Reliability and Risk Assessment Branch Division of Safety Technology FROM:

George W. Knighton, Chief Licensing Branch No. 3 Division of Licensing

SUBJECT:

DIABLO CANYON - REQUEST FOR SISI AUDIT We request that Frank Coffman of your staff audit the modifications made at Diablo Canyon Unit 2 with regard to the potential for a seismically induced systems interaction (SISI) between the in-core flux mapping system (source) and the seal table (target). This particular SISI was the subject of IE Information Notice No. 85-45 and a request for information by Commissioner Asselstine. As Hans Schierling discussed with Frank Coffman, the audit would take place on July 9, 1985. We have arranged for a PG&E representative to be available for the audit and also requested that the calculation / design packages for this SISI be available at the site. Your assistance in this matter is appreciated.

George W. Knighton, Chief Licensing Branch No. 3 Division of Licensing cc:

F. Coffman M. Mendonca DISTRIBUTION Docket File LB#3 Reading PRC System-HSchierling

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