ML20087D182

Final Significant Const Deficiency Rept 88 Re Overstressed Refueling Water Storage Pool Liner/Nozzle.Initially Reported on 831213.Restraints Added to Condensate Storage Pool to Reduce Pipe Forces Transmitted to Liner

ML20087D182
Person / Time
Site:	Waterford
Issue date:	02/27/1984
From:	Gerrets T LOUISIANA POWER & LIGHT CO.
To:	Jay Collins, Coolins J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
88, W3K84-0410, W3K84-410, NUDOCS 8403130311
Download: ML20087D182 (4)

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• NEW ORLEANS. LOUISIANA 70174. (504) 366-2345 UsuS$sEsNU February 27, 1984 W3K84-0410 Q-3-A35.07.83 Q q g c; - -

Mr. John T. Collins l

Regional Administrator, Region IV MD - 5 Ib'

j U. S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000

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f"j l) v Arlington, Texas 76012 q ;.,

REFERENCE:

LP&L Letter W3K83-1958 dated December 13, 1983

SUBJECT:

Waterford SES Unit No. 3 Docket No. 50-382 Significant Construction Deficiency No. 88

" Refueling Water Storage Pool Liner / Nozzle Overstressed Condition" Final Report In accordance with the requirements of 10CFR50.55(e), we are hereby prcviding two copies of the Final Report of Significant Construction Deficiency No. 88,

" Refueling Water Storage Pool Liner / Nozzle Overstressed Condition".

If you have any questions, please advise, Very truly yours, M

T. F. Gerrets Corporate Quality Assurance Manager TFG:CNH:JC cc: Director Cffice of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D.C.

20555 (15 copies)

Director Office of Management Information and Program Control U. S. Nuclear Regulatory Commission Washington, D.C.

20555 8403130311 840227 WOM i L

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1 Mr..J. T.' Collins Februaury 27, 1984 W3K84-0410 W

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Mr. E.'L.'Blake cc:

Shaw, Pittman, Potts, & Trowbridge 1800 M Street, N.W.-

Washington, D.C; 20036 Mr. W. h. Stevenson Monroe & Lemann 1424 Whitney Building New Orleans,~ Louisiana 70130 Records Center Institute of Nuclear Power Operations 1100 Circle _75 Parkway, Suite 1500-Atlanta,' Georgia 30339 W

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- FINAL REPORT OF SIGNIFICANT CONSTRUCTION DEFICIENCY-NO. 88

" REFUELING WATER STORAGE POOL LINER /N0ZZLE

- p OVERSTRESSED CONDITION" INTRODUCTION

-This report is submitted pursuant to 10CFR50.55(e).

It describes deficiencies

.that existed in two Storage Pool Liner interface connections.with the pool liner plates.overstressed at the connections.

This problem.is considered reportable under the requirements of 10CFR50.55(e).

To the best of our knowledge-this problem has not been identified to the USNRC

. pursuant to-10CFR21.

. DESCRIPTION.

As a-result of the stress analysis on the two Refueling Water Storage Pool 24" Nozzles.using'as-built piping loads, it was_ discovered that the pool liner plate'isloverstressed at the nozzle connection.

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Stress analyses were extended to all nozzles located at the following structures, as a verification of the adequacy _ of the liner / nozzle interface connections:

1)? - Reactor Auxiliary Building a)

Condensate Storage Pool 2)

- Fuel Handling Building a).

' b). _ Spent Fuel Storage Pool Spent Fuel Cask Storage Area c)

Spent Fuel. Cask Decontamination Area.

d)

Refueling Canal 3)

- Reactor' Building a)_

Refueling Water Storage Pool In addition to the Refueling Water Storage pool nozzles the above analyses tisclosed that.the' pool' liner plate on the two Condensate Storage Pool 6"

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nozzles are also overstressed at the nozzle connections.

'All_other analyses indicated _that the liner / nozzle interface connections were adequate.

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iS'AFETY' IMPLICATIONS'

' ab'Ifleftuncorrected,theapplicationsofas-builtpipingloadscouldhavc overstressedithe liner / nozzle interface connections of the Refueling Water l

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Storaga Pool and the Condensate Storage Pool ~..This could result in

performance degradation,of1the Emergency Core Cooling System, the Containment

_ Spray System,:and the Eaergency-Feedwater System.

CORRECTIVE ACTION O -i ~

The' design modifications to correct this significant deficiency were

-implemented by issuance of !DCN's -- NY-AS-650 and 659.

'1)

Reactor Auxiliary Building a)

Condensate Storage Pool - DCN-AS-659 added two restraints to reduce pipe forces being transmitted to the pool liner.

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Refueling Water Pool -~DCN-AS-650 added two restraints to

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reduce pipe forces being transmitted to the. pool liner.

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1 uel Handling Building.

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Spent Fuel Storage Pool - Analysis showed liner stresses were within: allowable limits.

b) 13 pent Fuel Cask Storage Area - Analysis showed liner stresses were within allowable limits.

.c)

(Spent Fuel Cask Decontamination Area - Analysis showed liner

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stresses were within allowable limits.

d)

Refueling Canal.- Analysis showed liner stresses were within allowable limits.

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- 3)

. Reactor Building

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a)~ LRefueling Pool'- Analysis showed liner stresses were within allowable stresses.

. Restraints were added'to Nozzles PF-13 ar.d PF-14 of the Condensate Storage

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Pool'and nozzles PF-4,and PF-5 of the Refueling Water Storage Pool. This freduced pipeLforces'on the liner, transmitted'by the nozzle, to ensure the

-liner;is within' allowable stresses. All corrective actions have been completed..

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This' report is' submitted as the Final Report.

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