GO2-83-389, Interim Deficiency Repts on Condition 221 Re Namco EA-180 & EA-740 Limit Switches & Condition 226 Re 125-volt Dc Motor Operator Connected to 250-volt Dc Power Source.Next Rept by 830726

Interim Deficiency Repts on Condition 221 Re Namco EA-180 & EA-740 Limit Switches & Condition 226 Re 125-volt Dc Motor Operator Connected to 250-volt Dc Power Source.Next Rept by 830726

ML20074A491
Person / Time
Site:	Columbia
Issue date:	04/26/1983
From:	Carlisle C WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
10CFR-050.55E, 10CFR-50.55E, GO2-83-389, NUDOCS 8305130106
Download: ML20074A491 (4)

Text

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Washington Public Power Supply System ,.,,

P.O. Box 968 3000GeorgeWashingtonWay Richland, Washington 99352 (509)372-5000 Docket No. 50-397 89 @

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April 26, 1983 G02-834389 Mr. J. B. Martin Regional Administrator U.S. Nuclear Regulatory Commission Region V 1450 Maria Lane, Suite 210 Walnut Creek, California 94596

Subject:

NUCLEAR PROJECT NO. 2 REPORTABLE 10CFR50.55(e) CONDITIONS #221, NAMC0 EA-180 AND EA-740 LIMIT SWITCHES AND #226, 125VDC MOTOR OPERATOR CONNECTED TO A 250 VDC POWER SOURCE

References:

a. Telecon dated January 4, 1983 (QA2-83-003), L.C. Floyd to J. Elin.

b. Telecon dated January 7, 1983 (QA2-83-010), L.C. Floyd to J. Elin.

c. Letter #G02-83-87, R.G. Matlock to R.H. Engelken, dated February 2, 1983.

In accordance with the provisions of 10CFR50.55(e), your office was informed by telephone, of the above potentially reportable conditions. Attachments I and II provide the Project's interim reports on the above conditions. We will continue to provide your office with quarterly updates until resolved.

The next report will be submitted by July 26, 1983.

If you have any questions regarding these subjects, please contact Roger Johnson, WNP-2 Project QA Manager, (509) 377-2501, extension 2712.

Program Director, WNP-2 LCF/kd Attachments: (2) As stated cc: W.S. Chin, BPA - Site A. Forrest, Burns and Roe - HAPO N.D. Lewis, EFSEC A. Toth, NRC Resident Inspector - Site WNP-2 Files /917B/917Y 0305130106 830426 PDR ADOCK 05000397 S PDR Yh

ATTACHMENT I WASHINGTON PUBLIC POWER SUPPLY SYSTEM NUCLEAR PROJECT NO. 2 DOCKET N0. 50-397 LICENSE N0. CPPR-93 10CFR50.55(e) CONDITION #221 NAMC0 EA180 AND EA740 LIMIT SWITCHES INTERIM REPORT Description of Deficiency Unqualified NAMCO EA740 limit switches SGT-POS-V/2A and SGT-POS-V/2B are instal-led in Class lE applications and are required to function during a Design Basis Accident (DBA).

Safety Implication These limit switches are used to indicate the positions (open/close) of safety related valves. Failure of the limit switches could result in erroneous valve position indication, thereby causing operator confusion or error during a DBA.

Corrective Action Limit switches SGT-POS-V/2A and SGT-POS-V/2B will be replaced with qualified Class lE limit switches. Additionally, other Class 1E applications of NAMC0 EA-180 and EA-740 limit switches are being reviewed for installation of unquali-fied limit switches.

Status of Corrective Action A review is being performed to identify the locations of unqualified NAMC0 EA-180 and EA-740 limit switches. A Project Engineering Directive (PED) will be issued directing the replacement of unqualified NAMC0 EA-180 and EA-740 limit switches identified during the review. Quarterly reports will be filed with your office until resolved.

ATTACHMENT II WASHINGTON PUBLIC POWER SUPPLY SYSTEM NUCLEAR PROJECT NO. 2 DOCKET N0. 50-397 LICENSE NO. CPPR-93 10CFR50.55(e) CONDITION #226 125VDC MOTOR OPERATOR CONNECTED TO 250VDC POWER SOURCE INTERIM REPORT Description of Deficiency The 125 Volt DC motor operator for valve RCIC-V-69, as installed, represents a nonconforming condition to the design in tnat 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 evaluat-ed as a noncompliance, but not reportable under 10CFR50.55(e). However, as the nonconforming motor operator was not returned to the vendor and was in fact in-stalled, it constitutes a noncompliance.

Analysis of Safety Implication 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 signifi-cant condition would result.

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

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

Failure of tne valve in the closed position would eliminate vacuum to the baro-metric condenser. This vacuum loss would prevent and/or terminate RCIC turbine operation. The reactor core isolation cooling system is designed 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 condition.

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

3. When required as a backup to the High Pressure Core Spray System to mitigate the consequences of the rod drop accident by automatically supplying cooling water to the reactor if vessel low water is sensed.

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

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Attachment II Page 2 of 2 Status of Corrective Action A new motor operator has been ordered for RCIC-V-69, and Nonconformance Report NCR-020634 has been initiated to identify the nonconforming condition.

A review and field inspection has been performed of all DC motor operated valves (M0V's) to compare the voltage rating to the applicable bus voltage has been performed. One additional valve, RCIC-V-19, has been identified as not being com-patible. All other valves are compatible. RCIC-V-19 has been identified on Non-conformance Report NCR-20632, and a new motor has been ordered to replace the existing one. In addition, all AC motors have been reviewed for compatibility, and are compatible for 460 VAC, 3 phase operation.

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