ML20065B550

Interim Deficiency Rept Re Nonconformance to Design in Nameplate Voltage of 125-volt Dc Motor Operator for Valve RCIC-V-69.Motor Operator Will Be Replaced.Review of Valves Conducted to Ascertain If Similar Conditions Exist

ML20065B550
Person / Time
Site:	Columbia
Issue date:	02/02/1983
From:	WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
Shared Package
ML20065B530	List: ML20065B527 ML20065B540 ML20065B550
References
10CFR-050.55E, 10CFR-50.55E, NUDOCS 8302230213
Download: ML20065B550 (2)

Text

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Attachment II WASHINGTON PUBLIC POWER SUPPLY SYSTEM NUCLEAR PROJECT NO. 2 DOCKET NO. 50-397 LICENSE NO. CPPR-93 10CFR50.55(e) CONDITION #226 125VDC MOTOR OPERATOR CONNECTED TO 250VDC POWER SOURCE INTERIM REPORT Description of Potential Defect or Noncompliance The 125 Volt DC motor operator for valve RCIC-V-69, as installed, represents a nonconforming condition to the design in that the nameplate voltage (125 Volt DC) is incorrect and inconsistent with the design voltage specified (250 Volt DC).

This inconsistency was originally discovered by the Architect Engineer while reviewing vendor drawings submitted for approval. This inconsistency was evaluated as a noncompliance, but not reportable under 10CFR50.55(e). How-ever, as the nonconforming motor operator was not returned to the vendor and was in fact installed, it constitutes a noncompliance.

Analysis of Safety Iruplication In the highly unlikely event that any one or all of the startup functional test programs would not have detected the noncompliance, the following safety significant condition would result.

RCIC-V-69 is designed to provide containment isolation and vacuum pump dis-charge valving to the supression pool.

Failure of the valve in the open position would degrade primary containment isoltion capability. However, containment integrity would not be violated, since a check valve is located outboard from RCIC-V-69. The condition would be a violation of containment isolation criteria and would be considered i reportable.

Failure of the valve in the closed position would eliminate vacuum to the l barometric condenser. This vacuum loss would prevent and/or terminate RCIC turbine operation. The reactor core isolation cooling system is designec to maintain or supplement reactor vessel water inventory during the following conditions:

1. Normal Operation. When the reactor vessel is isolated from its primary heat sink (the main condenser) and maintained in the hot standby condi-tion.

2. Normal Operation. When the reactor vessel is isolated and accompanied by a loss of normal coolant flow from the reactor feedwater system.

3. When required as a backup to the High Pressure Core Spray System to miti-gate the consequences of the rod drop accident by automatica!1y supply-ing cooling water to the reactor if vessel low water is sensed.

Due to item 3 above, the failure would be considered reportable.

F302230213 830202 PDR ADOCK 05000397 S PDR

. Attachment II Page 2 Status of Corrective Action The Project is endeavoring to obtain a replacement 250V motor operator.

Additionally, the Supply System has instituted a series of actions to identi-fy the failure mechanism which allowed the installation of the nonconforming 4 valves. The actions currently underway include: Initiating nonconformance reports for the installed valves; determine if it was a programmatic break-down that allowed the valves to get installed and if so, correct. A review of a larger population of valves is being conducted to ascertain if similar conditions exist with other motor operated valves.

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