ML19282B999
| ML19282B999 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 03/12/1979 |
| From: | Mary Johnson SOUTH CAROLINA ELECTRIC & GAS CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 7903190243 | |
| Download: ML19282B999 (3) | |
Text
.e SOUTH C A.MllN A ELECTPt; il GAS CO!WANY n r e.,.. o.a n..
Cow WH A, COU TH CMouhA 29210 M.C. JOHNSON w e earnine -: a.a e our o rc
- s. a ilarch 12, 1979
..r e,u, r w m n.. > e,c,.'"o United Sta tes Muclea r Regulatory Cornissieu Attn:
Mr. Jam " P. O'Reilly Director Region II 101 Marietta Street, NW Atlanta, Georgia 30303
Subject:
V. C. Summer Nuclear Station Unit #1 Reportable Itens In Accordance With 10CFR50.55(e)
Gentlemen:
On February 8, 1979, SCE&G identified to Region II concerns with the quality of accepted ASME code pipe radiographs. This letter is to provide an interim repot t on this matter and to update the status of previously identified items.
During routine SCE&G/QA surveillance of radiographic film packets, a number of packets were found which the SCE&G Level III NDE examiner evaluated as unacceptable because of documentation errors, technique or sensitivity problems and/or potential weld quality problems.
The number of packets considered unacceptable by SCE&G is in excess of that which could be explained by difference of interpretation.
Our evaluation to date indicates that the condition was the result of the level of pipe welding at this point on the Project together with a higher than desired number of repair radiographs reculting in pressure on inter-preters to not fall behind.
SCE&G also considers selection of a film type that provided marginal sensitivity a strong contributor even though the film selected always met Code requirements.
This position is substantiated by the large number of joints that have subsequently been resolved as acceptable af ter being reshot with a more sensitive film.
Many of the differences of opinion among Level III interpreters, are also being resolved with the reshots on the more sensitive film.
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- 979 As fruediate c o rre c t i v.-
action, a review of all film n;"*s accepLm to i
date was undertaken. Appro:ur.ately 500 packets out of 1100 D been
- r. viewed.
.c Of these, slightly over 257 have been.ielned queu h :able for U.t.hniqa.,
sensitivity or potential weld quality.
E,ich o f these 'pico t ii mab le packe a is prescatly being resolved by a team conposed of t-M P.CE6G. vel 111 and the Level Ill of the Code stamp 11 older.
F.enolution incl ud c - a 1:rge numl> e r of reshots, physical inspection of the joint, etc.
fo date, welds
- a. c e been reworked.
As part of the long term corrective action, until a c ha n c t-is justified based on results, SCESC/QA will review 100% of all accepted fety related radiographic film packets.
Any reshots 901 he th: using
'il-cporiFLed by SCE5G. More attention will be devoted to init h.1 film selec t ion.
Efforts have been on-going for some time to reduce the num' % of repM r radiographu.
We are confident that our initiated action will assure relevant defect-free weld joints documented by acceptable radiographic film.
A final report will be issued after the re-evaluation is complete.
Our update of previously reported items is as follows:
1.
Emerge _n_cy Diesel Generator Deficiencies Under a letter dated March 6, 1979, an SCE6C/QA release to work was transmitted to the Diesel Generator supplier for fluere-scent P.T. Inspection of rocker arms (and any neces ry repair) and replacement of lube oil hec:lers.
The supplier is new on-Site and has to date, removed and tested all rocker ar:rs No rocker arms required replacement but several were ground to remove rough areas.
Lube oil headers have been removed and replacwent is pending arrival of hardware.
2.
Rockwell Valve Operator Qualification _
On February 14, 1979, representatives of SCE6G/0A partic.ipated in the final inspection of the operators that had been returned for rework.
Surveillance was performed to confirm tha t all agreed material upgrading measures had been accomplished and certification was available to substantiate the success of the program.
The re-turned operators were released for shipment contingent on the supplier's field service representative installing limit switches when received.
In this regard, SCE6C has worked with Rockwell and the switch manufacturer directly to assure necessary QA program controls sufficient that the switches installed will be fully qualified.
rir. I r:*n i l' o ' P ce l I ! -
. P:i re 7 i:'s, l-l ' '.,
1,, o As an I Lei of inf or: ation, i ti o.
- >i
.i>m "i
-i v
thi<, problen of subvenlet qtalifIcut i
'a utth incorrtet pring uiterial Ia
.:ci,
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i-has confline! by test nr. in a report.ird.
i; ii, ;<?
replaced uprin.... net de;i:o requi.remr.at in41 t: i e! r ir..
te you, the it1:a did not connititute a repor!al'
!i t i:
Since all SCCf.C ac L J on on t hir item i;, cc.p! ore wirh t i, -
.:.cc ion of on-Site Inst allation of the limit wi tc h.
-m convicet thi.
inal report on thin iten.
Documentation of all of the above itemn i.
w.i i l a b l e fot yom re"iew durinp, subsequent inspection.
P]eane feel fne tu contact uc i i. w_ can provide additional informat. ion.
Very truly yours,,
fp.g. e.$y,,n s 9
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DAN /MCJ/jls cc:
C. J. Fritz C.
. Meetze fice of Director of Inspection & Enforcement Washington, D. C.
20555 bec:
V. C. Sumner E. II. Crews, Jr.
T. C. Nichols, Jr.
II. T. Babb
- 0. W. Dixon, Jr.
E. Wielkopolski R. C. IIolzwarth NPCP/Dixon
- 11. Radin A. A. Smith, Jr.
M. B. Jones C. C. Wagoner J. F. Algar J. M. Woods W. L. West C. K. Brown File T. B. Conner A
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