W3P82-3312, First Interim Rept for Significant Const Deficiency 64 Re Below Min Safety Injection Tank Discharge Flow Rates.Safety Analysis Will Be Reperformed.Final Rept Will Be Submitted by 830328

First Interim Rept for Significant Const Deficiency 64 Re Below Min Safety Injection Tank Discharge Flow Rates.Safety Analysis Will Be Reperformed.Final Rept Will Be Submitted by 830328

ML20066A208
Person / Time
Site:	Waterford
Issue date:	10/29/1982
From:	Maurin L LOUISIANA POWER & LIGHT CO.
To:	Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
10CFR-050.55E, 10CFR-50.55E, W3P82-3312, NUDOCS 8211050129
Download: ML20066A208 (2)

Text

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LOUISIANA ,42 ouAnONOe sincer P O W E R & L i G H T! P O BOX 6000

• NEW ORLEANS. LOUIS * (504)ANA 70174 366-2345

[IrEi?$50YIU L v. MAva/N October 29, 1982 Vice President Nuclear Operations W3P82-3312 Q-3-A35.07.64 Mr. John T. Collins, Regional Administrator, Region IV U.S. Nucient Regulstory Commission NM@[M[]\V/[M]

611 Ryan PLua Ut ive, Suite 1000 i

$ I ArJington, Texas-76012  !' E llN "

SUBJEGI: Waterford SES Unit No. 3 Docker Np. 50-382 Significant Construction Deficiency Report No. 64

" Safety Injection Tanks, Discharge Flow Rates" First Interim Report

Reference:

Telecon - M. A. Livesay (LPSL) to L. Martin (NRC) on 9-28-82

ear Mr. Collins:

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In accordance with the requirements of 10 CFR 50.55(e), we are hereby providing two yopies of the interim report on Significant Construction Deficiency No. 64, " Safety Injection Tanks, Discharge Flow Rates". This

, item waul originally identified as PRD #88.

Very truly yours, i

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- M L. Vr Maurit l 'INM/N L/pco cc W/15 copies): Director i

Office of. Inspection & Enforbement l U.S. Nuclear Regulatory Commission Washing ~ bon, D.C. 20555

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,s is qcsW/1 copy): Director, Of ficeNf Manogemcti N. Informatidn gnd c Pr'ogram Control a.- y U.S. Nuclear Regulatory Commission Washington, L.C. 20555

,'- 8211050127 821029 PDR ADOCK'05000382 S PDR

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INTERIM REPORT f \

SIGNIFICANT CONSTRUCTION DEFICIENCY No. 64 SAFETY INJECTION TANKS, DISCHARGE FLOW RATES l.

/ Introduction This report is submitted pursuant to 10 CFR 50.55(e) . It. describes a condition relative to the Yate of blowdown for Safety Injection tanks IA, 1B an;l 2B encountered.during preoperational testing. The blowdown' rates fell below the minimum predicted rate established by Combustion Engineering. This{ problem sis considered reportable under the requirements of :0 CFR 50.55(e). To the best of our knowledge, this problem has not been id.intified to the' Nuclear Regulatory Commission pursuant to 10 CFR 21.  !

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Description During preoperational testing the duration of blowdown for Safety Injection tanks IA, 1B and 2B was approximately 137 seconds for each tank. The maximum predicted duration of blowdown was approximately 101 seconds. Safety Injection Tank 2A performed within the-acceptable range of blowdown. This deviation is attributed to the installation of spring loaded check valves installed in the vertical portion of the discharge piping on all three (3) tanks. The high flow resistance of these valves resulted in the extended duration of blowdown.

The fourth tank did not require a spring loaded check valve since the check valve was installed in a horizontal pipe run, and thus a conventional swing check valve with a lower flow resistance was installed.

Safety Implications ,

Preliminary analysis by Combustion Engineering indicates that the extended blowdown times for these three (3) tanks would not impact on plant safety.

However, portions of the plant safety. analyses must be repa*; formed to establish a maximum allowable PLHR. The extent of this analysis is significant.

Corrective Action As noted above, Combustion Engineering will be directed to reperform the plant' safety analysis. The reanits of this analysis will reestablish the acceptability of the present system design.

Final Report Submittal Date It is anticipated that Combustion Engineering's analysis will be completed and the Final Report submitted by March 28, 1983.

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