05000346/LER-1980-007-03, /03L-0:on 800116,ref Position Verification for Group 5,rod 11,was Made 1-h & 40 Minutes Late.Caused by Operator Oversight Due to Lack of Adequate Reminder Sys. Multiple Timer Sys Will Prevent Recurrence

/03L-0:on 800116,ref Position Verification for Group 5,rod 11,was Made 1-h & 40 Minutes Late.Caused by Operator Oversight Due to Lack of Adequate Reminder Sys. Multiple Timer Sys Will Prevent Recurrence

ML19296B022
Person / Time
Site:	Davis Besse
Issue date:	02/12/1980
From:	Swanger F TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19296B017	List: 05000346/LER-1980-007, Forwards LER 80-007/03L-0 05000346/LER-1980-007-03, /03L-0:on 800116,ref Position Verification for Group 5,rod 11,was Made 1-h & 40 Minutes Late.Caused by Operator Oversight Due to Lack of Adequate Reminder Sys. Multiple Timer Sys Will Prevent Recurrence
References
LER-80-007-03L, LER-80-7-3L, NUDOCS 8002190702
Download: ML19296B022 (2)

LER-1980-007, /03L-0:on 800116,ref Position Verification for Group 5,rod 11,was Made 1-h & 40 Minutes Late.Caused by Operator Oversight Due to Lack of Adequate Reminder Sys. Multiple Timer Sys Will Prevent Recurrence

Event date:
Report date:
3461980007R03 - NRC Website

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U. S. NUCLE AR nEGULATORY COYMisstofJ fir 4C TCRM 2CG Q 71)

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44 61 COC*.E T Nu'.*3 d A nd tJ E%ENT DATE 14 75 HEPCHT D ATE 8J EVEfJT DESCRIPTIOlJ Af!D PROGACLE CONSEQUENCES h l On 1/16/80 at 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br />, the increased surveillance frequency requirement of T.S.

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[ol3l l 3.1.3.1.1 was missed. The inoperability of asymmetric rod fault circuitry for Group Si l Rod 11 required a zone reference position verification which was due at 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br /> but; o

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a TOLEDO EDISON COMPANY DAVIS-BESSE NUCLEAR POWER STATION UNIT ONE SUPPLEMENTAL INFORMATION FOR LER NP-33-80-09 DATE OF EVENT: January 16, 1980 FACILITY: Davis-Besse Unit 1 IDENTIFICATION OF OCCURRENCE: Missed increase surveillance of Group 5, Rod 11 position verification Conditions Prior to Occurrence: The unit was in Mode 1, with Power (>BCE) = 2762 and Load (Gross MWE) = 920.

Description of Occurrence: On January 16, 1980 at 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br />, the increased surveil-lance requirement of Technical Specification 3.1.3.1.1 was missed. The inoperability of asymmetric rod fault circuitry for Group 5, Rod 11 required a verification of rod position every four hours. A reading was due at 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br /> but was not made until 1440 hours0.0167 days <br />0.4 hours <br />0.00238 weeks <br />5.4792e-4 months <br /> the same day. At 1440 hours0.0167 days <br />0.4 hours <br />0.00238 weeks <br />5.4792e-4 months <br /> the operator remembered the increased surveil-lance requirement, took the reading, and reported his error.

Designation of Apparent Cause of Occurrence:

Due to an inadequate reminder system, the increased surveillance requirment was missed.

Analysis of Occurrence: There was no danger to the health and safety of the public or to station personnel. With the allowable 25% stretch in the frequency of the surveillance requirement applied, the operator was only 40 minutes late in his reading, and it showed the rod was still at its 100% withdrawn position.

Corrective Action

Corrective action consisted of counse ing the operator who missed the reading on the importance of taking all required readings on time.

To prevent a recurrence of the problem, a timer system is being provided which will have multi-pie timers to provide alarms to remind operators of non-routine required actions.

Failure Data:

Similar previous occurrence was reported in Licensee Event Report NP-33-79-44 on March 20, 1979.

LER #80-007