ML19275B609
| ML19275B609 | |
| Person / Time | |
|---|---|
| Site: | Washington Public Power Supply System |
| Issue date: | 10/12/1979 |
| From: | Bishop T, Dodds R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | |
| References | |
| PNO-V-79-004, PNO-V-79-4, NUDOCS 7912190745 | |
| Download: ML19275B609 (2) | |
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i PRELIMINARY NOTIFICATION
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E PFi!LIMINARY MOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE PHO-V-79-4 f
Ils oreliminary notification constitutes EARLY notice of events of POSSIBLE sa"c y or oublic interest sienificance. The infomation Dresented is as irotf aliv receivec mtnout verification or evaluation and is easically all I is (nown oy IE staff on this cate.
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Octobor 12, 1979 L
Fahility: Washington Public Power Supply System Washington Nuclear Project No. 2 (WNP-2) g Benton County, Washington Docket No. 50-460
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Subject:
WNP-2 Sacrificial Shield Constmction I.r Orfddune 6,1979, the NRC received eight allegations regarding faulty construction ofythe WSP-2 sacrificial shield wall. The composite steel / concrete wall surrounds tM reactor vessel, providing missile protection for the vessel, acting as a rayiological barrier, and functions as an ancMr point for the steel platfom su^ porting the main steam and feedwater lines.
Three of the allegations were stbstantiated during the NRC investigation; however, the three probic::s were pr@riously known by the licensee and were in the process of being resolved. The life::see's corrective action plans were examined in June. July and August 1979 dufing the NRC investigatior.. These corrective action plans included further detciled reviews and reinspections by the licensee and his contractors. On 00kaber 4,1979, the licensee reported to Region V additional deficiencies found inhhe wall (see Daily Report of 10/5/79).
The identified deficiencies in the (1, known at this date, are:
h 1, concrete voids in the wall.
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Visually rejectable welds in the structure, j
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Improperly located welds in the structure.
Origeber ll,1979, a news reporter telephoned Region V stating he was writing a stcry on this subject and also indicated the.t an individual had telephoned him id(ntifying still more deficiencies with the sacrificial shield.
The individual wat then contacted by Region V and identified hic:sclf as a fomer foreman involved inathe erection of the sacrificial shield wall in 1976.
He explained that weld fii; up tolerances were not achieved for some of the work he was responsible for and also that the shop fabricated secnents appeared (visually) to be improperly hef,t stressed. He did not have specific knowledge of improper heat stressing.
He$further stated that he had advised his supervisors and cognizant quality co, trol regresentatives of these pmblems and was told that the conditions were none of his busmess and to proceed with his work.
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i Pfr-Y-79-4 October 12, 1979 t
Tb licensee has been advised of these additional concerns and will address them in their review of the wall.
i This will be further reviewed by Region V during a plant inspection the week of 0*tober 22-25,1979.
IKidia interest,~ as noted above, is anticipated.
CONTACT:
T. W. Bishop /R. T. Dodds (415) 932-8300 Distribution:
Transmitted H St f.<.(;,J.n.
c/n-Cpatn.an Hendrie Comissioner Bradferd S. J. Chilk, SECY Ctrnissioner /annedy Corsnissioner Ahearne C. C. Kancerer, CA Ctrnissioner Gilinsky ACRS (For Distribution) i Tf.anstnitted:
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N M. Haller, MPA D. Vassallo, NRR J. J. Cumings. OIA R,'.G. Ryan. OSP D. Eisenhut, NRR K. K. Shapar, ELD SS Bldg ; ce - pe/n-(MAIL)
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W. J. Dircks, NMSS R. Minogue, SD Otiher Regional Offices l ec.u S. Levine, RES IE:X005 h
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