ML20085L046

First Interim Significant Const Deficiency Rept 88 Re Refueling Water Storage Pool Liner/Nozzle Overstressed Condition.Restraints Will Be Added to Deficient Nozzles to Reduce Nozzle Load on Pool Liners.Next Rept by 831215

ML20085L046
Person / Time
Site:	Waterford
Issue date:	10/07/1983
From:	Gerrets T LOUISIANA POWER & LIGHT CO.
To:	Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
10CFR-050.55E, 88, W3K83-1511, NUDOCS 8310210258
Download: ML20085L046 (4)

Text

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Louisiama P OW E R & LIG HT/Waterford 3 SES/P. O. Box B/Killona, LA 70066

$1NIN kYS October 7, 1983 W3K83-1511 Q-3-A35.07.88 PE4@.RDW1R v Mr. John T. Collins t

Regional Administrator, Region IV OCT I 41983 U. S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 L

O Arlington, Texas 76012  !-

REFERENCE:

Telecon between C. N. Hooper (LP&L) and C. Oberg (NRC) on September 9, 1983

SUBJECT:

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

" Refueling Water Storage Pool Liner / Nozzle Overstressed Condition" First Interim Report In accordance with 10CFR50.55(e), attached are two copies of the interim response to Significant Construction Deficiency No. 88, " Refueling Water Storage Pool Liner / Nozzle Overstressed Condition." This item was previously identified as PRD No. 124.

Very truly yours, T

T. F. Gerrets Quality Assurance Manager TFG:CNH:VBR cc: Director Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D.C. 20555 (15 copies) i

• 8310210258 831007 PDR ADOCK 05000382 4,

Mr. John T. Collins October 7, 1983 W3K83-1511 Page 2 4

cc: Director Office of Management Information and Program Control U. S. Nuclear Regulatory Commission Washington, D.C. 20555 Mr. E. L. Blake Shaw, Pittman, Potts, & Trowbridge 1800 M Street, N.W.

Washington, D.C. 20036 Mr. W. M. 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 f

e INTERIM REPORT OF SIGNIFICANT CONSTRUCTION DEFICIENCY-NO. 88

" REFUELING WATER STORAGE POOL LINER /N0ZZLE OVERSTRESSED CONDITION" INTRODUCTION This report is submitted pursuant to 10CFR50.55(e). It describes deficiencies

.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 is overstressed at the nozzle connection.

Further stress analyses was extended to all nozzles located at the following structures, to verify the adequacy of the liner / nozzle interface connections:

1) Reactor Auxiliary Building a) Condensate Storage Pool

2) Fuel Handling Building a) Spent Fuel Storage Pool b) Spent Fuel Cask Storage Area c) Spent Fuel Cask Decontamination Area d) Refueling Canal

3) Reactor Building a) Refueling Pool In addition to the Refueling Water Storage pool nozzles the above analysis <'"

disclosed that the pool liner plate on the two Condensate Storage Pool 6" t nozzles are also overstressed at the nozzle connections.

All other analyses indicated that the liner / nozzle interface connections are adequate.

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i SAFETY IMPLICATIONS s ,

If,left uncorrected, the applications of as-built piping loads will overstress the liner / nozzle interface connections of the Refueling Water Storage Pool and the Condensate Storage Pool. This could result in performance degradation of the Emergency Core Cooling System, the Containment Spray System, and the Emergency Feedwater System.s s.

+

' CORRECTIVE ACTION i

1. The design modifications to correct this significant deficiency are being incorporated via the following Design Change Notices (DCN).

(a) DCN-NY-AS-650 (Refueling Water Storage Pool)

(b) DCN-NY-AS-659 (Condensate Storage Pool)

Restraints are to be added to the deficient nozzles so that the nozzle loads imposed on the pool liners are reduced and the stress levels of the

. liners are ensured. -Corrective action is expected to be completed by December 2, 1983.

2. An update or final report will be submitted on December 15, 1983.

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