05000346/LER-1978-091-03, /03L-0:on 780815,svc Water Sys Valve Test Notrmed Performed within Required Time Limit.Caused by Personnel Misinterpreting Surveillance Test Schedule.Test Schedule Computer Program Modified,Alleviating Confusion

/03L-0:on 780815,svc Water Sys Valve Test Notrmed Performed within Required Time Limit.Caused by Personnel Misinterpreting Surveillance Test Schedule.Test Schedule Computer Program Modified,Alleviating Confusion

ML20147A762
Person / Time
Site:	Davis Besse
Issue date:	09/07/1978
From:	TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20147A757	List: 05000346/LER-1978-091, Forwards LER 78-091/03L-0 05000346/LER-1978-091-03, /03L-0:on 780815,svc Water Sys Valve Test Notrmed Performed within Required Time Limit.Caused by Personnel Misinterpreting Surveillance Test Schedule.Test Schedule Computer Program Modified,Alleviating Confusion
References
LER-78-091-03L, LER-78-91-3L, NP-33-78-108, NUDOCS 7809180313
Download: ML20147A762 (2)

LER-1978-091, /03L-0:on 780815,svc Water Sys Valve Test Notrmed Performed within Required Time Limit.Caused by Personnel Misinterpreting Surveillance Test Schedule.Test Schedule Computer Program Modified,Alleviating Confusion

Event date:
Report date:
3461978091R03 - NRC Website

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8 60 61 DOCKET NUMBER EVENT DESCR;PTION AND PROBABLE CONSEQUENCES lo 121 l On August 15, 1978 it was discovered y unit personnel that portions of the y

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- CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h A note to the surveil-l 11 l o l l Personnel error is attributed as the cause of this occurrence.

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NAME OF PREPARER

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1 TOLEDO EDISON COMPANY DAVIS-BESSE UNIT ONE NUCLEAR' POWER STATION f

SUPPLEMENTAL INFORMATION FOR LER NP-33-78-108 i

l DATE OF EVENT:;. August'15, 1978 FACILITY: Davis-Besse. Unit 1 IDENTIFICATION OF OCCURRENCE: ' Failure to perform Service Water System Valve Test within allotted limit Conditions Prior to occurrence:

The unit was in Mode 3, with Power (MWT) = 0, and Load (MWE) = 0.

Description of Occurrence: On August 15,.1978, at 1615 hours0.0187 days <br />0.449 hours <br />0.00267 weeks <br />6.145075e-4 months <br />, it was discovered by unit personnel that portions of the Service Water Valve Test ST 5075.01 were not perf ormed within the required time interval.

Technical Speci-fication 4.0.5 refers to the ASME Code which requires all ASME Section XI valves to be tested at least once every 92 days. The maximum allowable extension period 25% of the 92 day frequency which required testing to be completed by August was 14, 1978.

- Designation of Apparent Cause'of Occurrence: Personnel error is attributed as the cause of this occurrence.

Surveillance test personnel added a note to the surveil-lance test schedule stating that ST 5075.01 Valve Sheets 1-3 must be completed by August 13, 1978 to avoid. violation of Technical Specification 4.0.5.

Operations misinterpreted the note to read valve sheet 3 only and subsequently on August 14, 1978 at 1545 hours0.0179 days <br />0.429 hours <br />0.00255 weeks <br />5.878725e-4 months <br /> 115 days after the last completion of ST.5075.01, the unit was in violation of Technical Specification 4.0.5.

1 Analysis of Occurrence: There was no danger to the health and safety of the public

~or unit personnel. On August 16, 1978 at 1039 hours0.012 days <br />0.289 hours <br />0.00172 weeks <br />3.953395e-4 months <br />, the appropriate service water valves were verified to be within required stroke times. Therefore, the afore-mentioned valves have been in an operable state since the'last date of testing.

Cqrrective Action:

Or. August 16, 1978 at 1039 hours0.012 days <br />0.289 hours <br />0.00172 weeks <br />3.953395e-4 months <br />, Section 8 of ST 5075.01 was completed, thereby, satisfying the surveillance requirements of Technical Specifi-cation 4.0.5.

Also, surveillance test personnel have modified the computer pro-gram of the surveillance test schedule to alleviate any confusion as to which valve sn2ets are to be usec during testing.

Failure Date: The following Licensee Event Reports have been written for personnel errors involving incompletions of Surveillance Tests:

NP-33-77-93, NP-33-77-101.

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