ML18139B301

Updated LER 81-007/03X-1:on 810316,w/Unit 1 Defueled & 2 at 100% Power,Power for Several Radiation Monitors Lost.Caused by Shorting of Test Lead to Ground Causing Supply Fuse to Blow.Fuse Replaced.Monitors Returned to Svc

ML18139B301
Person / Time
Site:	Surry
Issue date:	05/07/1981
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18139B300	List: ML18139B299 ML18139B301 ML18139B302 ML18139B303
References
LER-81-007-03X, LER-81-7-3X, NUDOCS 8105120477
Download: ML18139B301 (2)

Text

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'" A LICENSEE EVENT RE?ORT "UPDATED REPORT-PREVIOUSWi>ORT DATED 04/13/81 CONTROL BLOCK: I I I I I 1

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IPLEASE PRINT OR TYPE Al.I.. REQUIREt) INFORMATION!

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[]JI] l With Unit 1 defoeled and Unit 2 at 100%. power*,. power was lost, for five minutes, to the following radiation monitors: RM-GW0101, 102; RM-VG-103,

• 104; RM-LW-108;

• and

_{III] I RM-SW-107. This is contrary' to T .S. -3 .11.A. 5, 3. 11.B. 4, 3. 7 -and 4. 9C and is reportable per T.S. - 6.6.2.b(4). Since the applicable AP's were performed and the release that was in progress was terminated immediately, the health and safety of

((II] l the public were not affected.

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o::J]J I Inadvertent shorting of a tes-t le:ad to ground caused a supply* fuse to blow, thereby OJI] creating a loss of power to the monitors. The fuse was replaced and the monitors o:::IIJ I returned to service within five minutes.

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e e UPDATED REPORT-PREVIOUS REPORT DATED 04-13-81 ATTACHMENT 1 SURRY POWER STATION, UNIT 1 DOCKET NO: 50-280 REPORT NO: 81-007/03X-l EVENT DATE_: 3-16-81 TITLE OF EVENT: LOSS OF POWER TO RADIATION-MONITORS

1. - DESCRIPTION OF EVENT:

With Unit No. 1 defueled and Unit No,2 at 100% power, electrical po~er was lost to the following radiation monitors*: RM-GW=lOl, 102 (process- vent}; RM.,-VG-103, 104 (Ventilation Vent); RM-LW-108 (Liquid- Was*te), and RM-SW-107 (component -

cooling service water). 'Th.is is- contrary to Teen. Spec. 3.11.A.5, 3.11.B.4, 4.9C and 3. 7, table 3. 7-5.

This event is reportable per Tech. Spec, 6.6.2,b(4}.

2. PROBABLE CONSEQUENCES AND STATUS *op REDUNDANT EQUIPMENT:

The above radiation monitors serve to provide indication and recording of gross activity levels. In addition, they provide alarm functions and selected monitors provide control actions. Since the actions required by applicable abnormal procedures were performed, e.g. termination of liquid waste release, the release that was. in progress was within allowable Tech. Spec. limits, and all the monitors were returned to service within five minutes, the health and safety of the public were not affected.

3. CAUSE:

The loss of power to the monitors. was- due to a blown fuse. The blown fuse was caused by the inadvertent s.horting of a test lead to ground while performing radiation monitor calibration checks,

4. IMMEDIATE CORRECTIVE ACTION:

Applicable abnormal procedures were performed, 'The blown fuse was* replaced and all radiation monitors were returned to service within five minutes.

5. SUBSEQUENT CORRECTIVE *ACTION:

• None.

6. ACTIONS TAKEN TO PREVENT RECURRENCE:

Since procedures are available to cope with .this type failure and maintenance personnel are well versed in the possible results* of personnel error, no additional action is deemed necessary.

7. 'GENERIC TMPLTCATTON :

None *

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