ML18139A828

LER 80-031/03L-0:on 801015,pipe Support in Alternate Charging Header Found in Overstressed Condition Per IE Bulletin 79-14,Suppl 2.Caused by Faulty Installation. Modified Support & Returned Subsys to Svc

ML18139A828
Person / Time
Site:	Surry
Issue date:	11/13/1980
From:	VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18139A827	List: ML18139A826 ML18139A828 ML18139A829
References
IEB-79-14, LER-80-031-03L-02, LER-80-31-3L-2, NUDOCS 8011180609
Download: ML18139A828 (2)

Text

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[£ITI I With Unit 2 operating at 100% p:)wer, tili.e as built pipe support review by the

[£))] I Archit_ect .Engineer disclosed a pipe support in a .overs.tressed condition in the

~ alternate charging header.

[§JI) This event is re]?8rtable in accordance with I.E. Bulletin No. 79-14-Supplenent 2.

The health and safety of the p..lblic were not affecte::1.

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CAUSE DESCRIPTION A"ND CORRECTIVE ACTIONS @

I Pipe SJ.J:m;ort was not installe::1 as oer design resulting in . -;::rn overstressed condition.

ITID Isa] ate:3 the affecte::1 subsysteu ., -'1Tl()c'l_if i ro thP.

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NAME OF P R E P A R E R - - - - - - - - - - - - - - - - - - PHONE:-------------

e ATTACHMEMT 1 SURRY POWER STATION, UNIT 2 DOCKET NO: 50-281 REPORT NO: 80-031/031-0 EVENT DATE: 10-15-80 TITLE OF REPORT: PIPE SUPPORT IMPROPERLY INSTALLED

1. DESCRIPTION OF EVENT:

With Unit 2 operating at 100% power, the final as-built review of supports in-stalled as -a result of IE Bulletin 79-14, showed an overstressed pipe -support in the alternate charging system (4-CH-389, FC-1298A). This event is reportable as per IE Bulletin No. 79-14-Supplement 2.

2. PROBABLE CONSEQUENCES AND.STATUS OF REDUNDANT SYSTEMS:

The overstressed support could.result in a pipe support failure, and pipe overstressed condition. Since this sub system (alternate charging system) was isolated upon notification *of a possible overstress condition, the health safety of the public were not affected.

3. CAUSE OF EVENT:

The pipe support was not ~nstalled as per.design requirements.

4. IMMEDIATE CORRECTIVE ACTION:

Isolated the alternate charging header by closing MOV':'"2287A, B, and C.

5. SUBSEQUENT CORRECTIVE ACTION:

Corrective action was taken to modify the supports in accordance with pre-liminary design drawings . .These modifications were completed within the same day as the notification of an overstressed condition.

• The alternate charging header was returned to service after completing the modification.

6. ACTION TAKEN . TO PREVENT RECURRENCE:

None required.

7.

• GENERIC IMPLICATIONS:

This is .part of a continuing effort as required by TE Bulletin 79-14.