ML20206G408

SER Supporting Employee Concern Element Rept Co 10307-SQN, Uncoated Welds as Related to Const

ML20206G408
Person / Time
Site:	Sequoyah
Issue date:	11/04/1988
From:	NRC OFFICE OF SPECIAL PROJECTS
To:
Shared Package
ML20206G037	List: ML20206G034 ML20206G298 ML20206G302 ML20206G306 ML20206G315 ML20206G319 ML20206G325 ML20206G330 ML20206G337 ML20206G344 ML20206G348 ML20206G352 ML20206G358 ML20206G363 ML20206G366 ML20206G370 ML20206G374 ML20206G380 ML20206G385 ML20206G392 ML20206G396 ML20206G404 ML20206G408 ML20206G410 ML20206G416 ML20206G419 ML20206G426 ML20206G429 ML20206G435 ML20206G438 ML20206G447 ML20206G453 ML20206G457 ML20206G459 ML20206G462 ML20206G466 ML20206G472 ML20206G480 ML20206G486 ML20206G497 ML20206G502 ML20206G509 ML20206G519 ML20206G524 ML20206G529 ML20206G534 ML20206G539 ML20206G543 ML20206G550 ML20206G559 ... further results
References
NUDOCS 8811220266
Download: ML20206G408 (2)

Text

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - _ _ - _ _ _ _ _ _ _ _ _ _ _ _ _ _ . _

e s' g

/ r .i g?, UNITED STATES '

?? NUCLEAR REGULATORY COMMISSION 5;kg#t.Yj usmNoToN. o. c. aosss

\ *". ~.

..#. Yj i

l SAFETY EVALUATION REFCRT BY TfiE OFFICE Or SPECIAL PROJECTS EMPLOYEE CONCERif ELiMENT REFORT CO 10307-SON, "UNC0ATED WELOS AS RELATED TO CONSTRUCTION" TENtiESSEE VALLEY AUTHORITY SEQUOYAH NUCLEAR POWIR PLANT UNITS 1 & 2 ,

00CFET NOS. 50-3 D AND 50-328 4

i I. Sub]e:t ,

l Category: Construction (10000)

Subcategory : (103CO)

Eletent: Uncoated Welds as Related to Construction (10307)

The basis for Element Report C010307-SQN, Rev. 5, dated November 17, 1986 is ,

Watts Bar Ecployee Concerns IN-8E-243-002 and IN-85-833-001, which state (respectively):

"All hanger and structural steel over 6' above floor in the Reactor Bldg.

4 anc Aux. Bldg. Units 1 & 2 were unpainted. This was a cost savings i

factor." s  :

"Top coat of paint was deleted as a requirement above 5' (above floor i level) in Unit 1 Reactor Building. Items / walls are painted with prirrer  ;

i coat only above this elevation. C/I is concerned that this could 1

advei sely affect washdown/ radiological decontamination of areas."

I related and These corcerns evaluated by TVA as potentially nuclear safety-(generic).

potentiaily applicable to Sequoyah Nuclear Power Plant (SNP)

)

!!. Issue J

TVA cefined the issue as failure to paint, or provide a topcoat of paint for hangers,structuralsteelmembers(includingapplicableweld)andpossibly ,

other surfaces more than six feet above floor levels. Failure to paint or l

tepcoat these areas could hinder radiological decontamination, if required.

i 111. EVALUATION l

1he TVA evaluators reviewed decurents, interviewed personnel and observed a '

l 1

' sargle of the applicable surface areas at the SNP. They determined that the SNO desitn required the priring of surfaces above the six toot level for '

i ccrresica rertectict, :ut cid not recuire topccating for possible radiclegical cecontcn ration. hc in; roper celetion of topcoating r(cuirements or improper l  ;

i1:.itation of ccating requirerents were evident at Sequoyah.

< 8011220266 8811 4

)

PDR ADOCK 050 327 ,

P PDC I l

Sore rusty welds on structurcl steel mer.bers were identified, but this general proolem was being aedressed by the response to Corrective Action Report (CAR)

SCN-CAR-66-01-001. These rusty welds were determined to be the result of mocifications and repairs.

The TVA evaluatier, concluded that there was no evidence of improper deletior of topccating or limitation of cuating at Sequoyah, and no corrective action was seguired with respect to specifications or drawings affecting coatings.

Specific welds identified as requiring protective coating er repair to existir.s protective coating will be repaired through Maintenance Requests (MRs).

IV. Cerclusicn The hRC staff coricludes that the TVA investigatien of the concerns was acecuate, and their resolution of the concerns, as described in Element Report C010307-50N, Rev 5, is acceptable.

The su: Ject of uncoatec welds is also discussed in Generic Employee Concern Evaluation Report hurter WP-CS-50h. Revision 1 of this report, dated August 26, 1956 has been reviewed by the NRC staff and is considered to be ccr.sistent with Element Report C010307-SQN, key, 5.

i f

i

- - . - - _ .