ML20135A856

Investigation Case 5-82-006 on 820612-0907.No Violations Noted.Major Areas Investigated:Allegations Re post-weld Heat Treatment on Piping.Case Closed

ML20135A856
Person / Time
Site:	Palo Verde
Issue date:	01/31/1983
From:	Fitzgerald J, Power E, Shackleton O NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V), NRC OFFICE OF INVESTIGATIONS (OI)
To:
Shared Package
ML20135A816	List: ML20135A813 ML20135A822 ML20135A834 ML20135A845 ML20135A856 ML20135A869
References
5-82-006-01, 5-82-6-1, NUDOCS 8509100295
Download: ML20135A856 (2)

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UNITED STATES 8 o NUCLEAR REGULATORY COMMISSION

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OFFICE OF INVESTIGATIONS January 31, 1933 g REPORT OF INVESTIGATION TITLE: Palo Verde Nuclear Generating Station, Allegations Re: Postweld Heat Treatment on Piping SUPPLEMENTAL: DN 50-528 CASE NUMBER: 5-82-006 CONTROL OFFICE: San Francisco STATUS: CLOSED PERIOD OF INVESTIGATION: June 16 - September 7, 1982 REPORTING INVESTIGATOR:

Tugpfe J.gwbr, Investigator Office of Investigations, Region V PARTICIPATING PERSONNEL: Owen C. Shackleton Jr., Director Office of Investigations, Region V Philip V. Joukoff, Investigator Office of Investigations, Region V L. E. Vorderbrueggen, Senior Resident Inspector Region V, USNRC REVIEWED BY: 44Y# // Im Owen C. Shackleton Jr., Diredtor -

Office of-Investigations, Region V APPROVED BY: A

/ Jam /s A. Fitzge't dV Acting Director

@ffice of Invest ations g e o.,;=

B509100295 850905 PDR ADOCK 0 % y8 G

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SUMMARY

l On May 25, 1982, a former employee of Western Stress, Incorporated, at PVNGS, '

advised members of the Atomic Safety and Licensing Board (ASLB) that he over-heard a conversation in April 1981 that Post Weld Heat Treatment (PWHT) thermo-couples could be improperly wired, and that he therefore believed the resulting records were falsified.

This NRC investigation involved interview of the alleger, review of a previous Bechtel Power Corporation investigative report on the same allegation conducted in May 1981, detailed interviews of four individuals who had direct knowledge-of the PWHT activities during the established time period, and examination of 121 out of a total of 1016 PWHT records for PVNGS Unit 1.

The investigation revealed that there was a conversation among some employees of Western Stress, Incorporated, and an employee of the Bechtel Power Corporation regarding the wiring of thermocouples in parallel or a conversation of a _

similar nature. Persons interviewed regarding the conversation stated that it was in jest.

No instances of PWHT thermocouples being wired in parallel or improperly being wired were discovered nor were indications of incorrect of

" falsified" records identified. No indications of post weld heat treatmen.t  ;

activities performed which were contrary to NRC rules and regulations or contrary to industry standards were identified during this investigation.

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