ML19273A978

LER 79-001/03L-0 on 790102:monthly Functional Test Not Performed on Reactor Protection Sys Channel 2 within Allowable Time.Caused by Breakdown in Communications Between Testing Personnel & Test Coordinator

ML19273A978
Person / Time
Site:	Davis Besse
Issue date:	01/29/1979
From:	Borysiak M TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19273A977	List: ML19273A976 ML19273A978
References
LER-79-001-03L, LER-79-1-3L, NUDOCS 7902010162
Download: ML19273A978 (3)

Text

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NRC FORM 3GG (7 77)

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LICENSEE EVENT REPORT

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o 2 lOn 1/2/79, the Surveillance Test Coordinator discovered that the Monthly Functional The o 3 l Test had not yet been performed on Reactor Protection System (RPS) Channel 2. [

o 4 test late date which includes the maximum allowable extension was 1/2/79 at 0720 hourd.

o s The channel was declared inoperable at 1125 hours0.013 days <br />0.313 hours <br />0.00186 weeks <br />4.280625e-4 months <br />. There was no danger to the health ]

o 6 and safety of the public or unit personnel. The completion of the required Surveillange RPS Channels 1, 3, and 4 were operable]

o d l Test verified that RPS Channel 2 was operable.

O a lar the time RPS Channel 2 was declared inoperable. (NP-33-79-02) ]

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i o !There was a breakdown in communications between testine narconnel arid tho taqr cone-dinator. The Surveillance Test was completed and at 15:125 hours, the channel was _

lgj,gg declared operable. The Instrument and Control (I&C) Foreman will now be issued a

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! >t *) 10 233 p DVR 79-00'7 Mike Barysiak PHONE. 419-259-5000, Ex t. 3 NAME Of PinEPAHEH

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TOLEDO EDISON COMPANY t DAVIS-BESSE NUCLEAR POWER STATION UNIT ONE SUPPLEMENTAL INFORMATION FOR LER NP-33-79-02 DATE OF EVENT: January 2, 1979 FACILITY: Davis-Besse Unit 1 Channel 2 of the Reactor Protection System (RPS)

IDENTIFICATION OF OCCURRENCE:

was declared inoperable due to failure to perform requic2d surveillance testing The unit was in Mode 1, wirn Power (MUT) = 2467, and  !

_ Conditions Prior to Occurrence:

Load (Gross MWE) = 839.

Description of Occurrence: On January 2,1979, the Surveillance Test Coordinator dis-covered that ST 5030.02, "RPSlate Monthly Functional Test" had not yet been performed on date (maximum allowable extension) was January 2,1979 RPS Channel 2. The test at 0720 hours0.00833 days <br />0.2 hours <br />0.00119 weeks <br />2.7396e-4 months <br />. Af ter verifying the testing interval was exceeded, the Surveillance Test Coordinator informed the Shif t Foreman, who then declared the channel inoperable at 1125 hours0.013 days <br />0.313 hours <br />0.00186 weeks <br />4.280625e-4 months <br />.

This placed the unit in the Action Statements of Technical Specification 3.3.1.1.

The channel was bypassed to perform the required testing within one hour of the time the channel was declared inoperable.

The Instrument and Control RPS Foreman was notified that the test would have to be per-Channels 1, 3, and 4 were operable at the time RPS Channel 2 formed immediately.

was declared inoperabic.

There was a breakdown in communications Designation of Apparent Cause of Occurrence: coordinator which caused the delay in the per-between testing personnel and the test formance of ST 5030.02.

Analysis of Occurrence: There was no danger to the health and safety of the public or to unit personnel. The completion of the required Surveillance Test verified that RPS Channel 2 was operable.

Corrective Action: At 1200 hours0.0139 days <br />0.333 hours <br />0.00198 weeks <br />4.566e-4 months <br />, on January 2, 1979, ST 5030.02 was started on RPS Channel 2. The Surveillance Test was completed and at 1925 hours0.0223 days <br />0.535 hours <br />0.00318 weeks <br />7.324625e-4 months <br />, the channel was declared operable.

To prevent recurrence, the Instrument and Control Foreman will now be issued a copy of Instrument and Control weekly schedule of required testing so the Instrument and Control Foreman can determine which tests are required without instructions from the Test Coordinator.

LER #79-001

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4 TOLEDO EDISON COMPA:;Y g DAVIS-EESSE NUCLEAR POWER STATION U';IT ONE PAGE 2 SUPPLE'1 ENTAL INFOR". ATION FOR LER NP-33-79-02 f

Failure Data:

There have been no previous occurrences of late surveillance testing caused by a breakdown in co=unications.

LER #79-001 1

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