ML19322B877
| ML19322B877 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 11/05/1979 |
| From: | Kellogg P, Webster E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| References | |
| PNO-II-79-024, PNO-II-79-24, NUDOCS 7912070046 | |
| Download: ML19322B877 (1) | |
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o FFILItiINARY NOTIFICATION November 5, 1979
?::1111: F;IY NOTIIICATION OF EVENT OR U'a'SUAL OCCURRENCE PNO-II-79-24
_I::f r T r e. i=i.c.a..r.v. notifier. tion constitutes EARLY notice of an event of POSSIBLE
- sf.e.:'. cr et'511e interest significance.
Tite infor:nati_oc _oresented is es initialh; re re'.va d u.:..out verification or ev._aluation and is basically a__ l that is hacun by l
sta f f :s :f this date o
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'lirginia Electric and Fover Ccspany D
f N.rth I.nna, U:its I and 2 l vI v.
E:. eke-No. 50-338 and 50-339
- 'ineral, '.'irginia f.k
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~ ~( !.rd _a SU3 JECT:
SIISMIC ANALYSIS ERRORS 5t::e and Uetster (S&W) infor=ed VIPCO today of an error found in their analysis cf pipin: systcc seismic response.
S& had been reanalyzing piping systems in response to
~.E Eulletin 79-14 vben the error cas discovered.
The error involved ure of an absole:e Response Spectrum Curve for auxiliary syste: c at both North le.: :.:21:s. VIPCO has not been inforced of the severity of the error, nor
,;::ific:lly tha: sy:te:: are affected.
VP2C0 estirnstes that re:n 1vsis and
- :. r r e :.1 % :: tion wi'.1 require at l e.> s t eicht (S) veeks.
Licensee d: : not
- p ec: :hs to er. tend the present. Unit I refueling outage, scheduled for
- pien::. 1: =ii-Janu:.ry, 1 CO.
S&*i reports 44 isometric drevings are effected Ic : 'ini:. I nd 3 isc::tric dr:. wings for Unit 2.
Only auxiliary syste.r.: not i
uro:12nd rith the contain=:nt. or primary pressure boundar'/ cre involvad.
- cdia 1:::erest is expected.
The licensee o.lene, to issue a neus release teday.
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I:.e N C Ce : not plan to issue a news release.
The Cor:nonwealth of Virginia has
.:_ en ir.!:: ei.
7.;-ic:. E.
'l. lanta) received notification of this occurrence by. tele:: hone frc:
- '..e li: 2:.s ea at I:30 p.=. en November 5.
h tjet:
E. H. Webster, RIT 242-5549; P. J. Nellogg, nII 242-5649 2 '.s t rib a ti:n :
Transeitted H. St.
Ea'ir.12..e:.f rie Coraissioner Bradford S. J. Chilh, SECY
'.'c rissi tor Kennedy Cctrissior.or Ahearne C. C. I:armerer, CA
- er-is:it er Gilieshy ACRS (Fo: Distribution)
Trans:i tted:.T:S Phillips XOOS8 *,29 (IE:HQ Dist.)
L. V. Gorrick, EDO H. R. Denton, NRR H. L. C'rnstein, EDO R. C. DeYoung, NRR J. J. I:::hr.rd, ?A R. J. M :tson, NPI L ndou _
(6 nin./p:ge) s. M. '.011 er, M?A D. Vasscllo, NRR J. J. Cu: sings, OIA R. G. I:/::, CS?
D. Eizcnhut, NRR
'i. ::. 5:::p::, ELD W111ste
' FAIL V. J. Dirchs, NHSS R. Minogue, SD 0:hcr 2:; ice:1 Offices S..Levice, RES XOCS-(Time)-
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??2LIMINARY !!GTIFICATIO:s 7 912 070 O y 6 g-
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