05000280/LER-1979-018-01, /01T-0 on 790509:solenoid Valve Model 8320A102 Mfg by Automatic Switch Co Found Environmentally Unqualified & Reportable Per IE Bulletin 79-01 & Tech Specs.Valve Could Fail to Control Admission & Venting of Air During LOCA

/01T-0 on 790509:solenoid Valve Model 8320A102 Mfg by Automatic Switch Co Found Environmentally Unqualified & Reportable Per IE Bulletin 79-01 & Tech Specs.Valve Could Fail to Control Admission & Venting of Air During LOCA

ML18114A608
Person / Time
Site:	Surry
Issue date:	05/23/1979
From:	Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18114A607	List: 05000280/LER-1979-018, Forwards LER 79-018/01T-0 05000280/LER-1979-018-01, /01T-0 on 790509:solenoid Valve Model 8320A102 Mfg by Automatic Switch Co Found Environmentally Unqualified & Reportable Per IE Bulletin 79-01 & Tech Specs.Valve Could Fail to Control Admission & Venting of Air During LOCA
References
LER-79-018-01T, LER-79-18-1T, NUDOCS 7905290010
Download: ML18114A608 (2)

LER-1979-018, /01T-0 on 790509:solenoid Valve Model 8320A102 Mfg by Automatic Switch Co Found Environmentally Unqualified & Reportable Per IE Bulletin 79-01 & Tech Specs.Valve Could Fail to Control Admission & Venting of Air During LOCA

Event date:
Report date:
2801979018R01 - NRC Website

text

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@IIJ I The Architect Engineer has i den ti fi ed Sol Pnoi a Valve, Model #832DAJ 02, marn,fac-tnred by I

[]JI] I Automatic Switch Company, as being environmentally unqualified and reportable as pe:!:_J

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l I.E.Bulletin 79-01 and Technical Specification 6.6.2.b. (9).

The valve could fail to [QJ}J I control the admission and venting of operating air for the inside containment trip

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jvalves on steam generator blowdown lines during a LOCA.

The fully redundant outside (III] ~'!~.tainment trip valves Would have provided containment isolation, if required, C§:1[] !Therefore, the health and safety of the public were not affected.

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!The solenoid valves, Model #8320Al02, were identified as being similar to a solenoid_

[III] jvalve that failed environmental testing for the LOCA environment.

The three affected [I))] jon each unit wili be replaced with environmentally qualified valves.

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(Attachment, page 1 of 1)

Surry Power Station, Unit 1, 2 Docket No: 50-280, 281 Report No: 79-018/0lT-0 Event Date:

05-09-79

. Environmentally.Unqualified Solenoid Valve (SOV-BD-lOOA,B,C and 200A,B,C)

1.

Description of Event

The Architect Engineer has identified a solenoid valve, Model #8320Al02, manufactured by Automatic Switch Company, as being environmentally *unqualified for the conditions stated in I.E. Bulletin No. 79-01.

Six valves were identified, three in each of Surry Units 1 and 2.

2.

Probable Consequences and. Status of Redundant. Systems:

3.

4.

The solenoid valve could fail to function properly following a Loss of Coolant Accident.

These valves control the admissio~ and venting of operating air for the containment trip valves on steam generator blowdown lines.

The ful1y redundant outside containment trip valves would have provided containment isolation, if required.

Therefore, the health and safety of the public were not affected.

Cause

The solenoid valves, Model l/8320Al02, were identified as being similar to another solenoid valve that failed environmental testing.

Immediate Corrective Action

A search was initiated to locate environmentally qualified sol*enoid valves.

5.

Subsequent Corrective Action:

The subsequent corrective action will be the replacement of the present solenoid valves with environmentally qualified solenoid valves.

6.

Action Taken to Prevent Recurrence:

No additional actions are deemed necessary.

The solenoid valves are being replaced.

7.

Generic Implications:

Envirom:n=:ntal qualifications of other electrical components will be addressed in the response to IE Bulletin No. 79-01.