ML20085C724

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Supplemental Deficiency Rept CP-86-023 Re Potential Failure of Reactor Protection Sys Permissive P-10 to Reset During Power Reduction Below Setpoint.Initially Reported on 860605. Unit 1 Corrective Actions Complete
ML20085C724
Person / Time
Site: Comanche Peak  Luminant icon.png
Issue date: 10/03/1991
From: William Cahill
TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
CP-86-023, CP-86-23, TXX-91342, NUDOCS 9110110004
Download: ML20085C724 (1)


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Log # TXX-91342 file # 10110 TUELECTRIC 907 2 Ref.

'0CfR50.55(e)

October 3, 1991 William J. Cahlil, Jr.

Executivt l'ke PressJent U. S. Nuclear Rrgulatory Commission ATTN:

Documen'. Control Desk Washingttn, C, C. 20555

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)

DOCKET POS 50-445 AND 50-446 P-10 PERMISSIVE SDAR CP-86-023 (SUPPLEMENTAL REPORT)

Gentlemen:

On June 5,1986, TV Electric notified the NRC via TXX-4835 of a reportable deficiency 4 volving a potential failure of the reacto protection system permissive, P-10, to reset during power reduction to below the P-10 setpoint.

'The most recent report on this issue, logged TXX-88427, was submitted on May 5, 1988.

The purpose of this report is to provide the current status of corrective actions.

As noted in TXX 1835, os corrective action, operations procedures will be revised to provide the operator with additional information concerning the

~

P-10 permissive and actions to be taken under certain operating conditions.

Unit 1 corrective action has been completed and the Unit 2 action will be consistert @ th tha Unit 1 action.

For Unit 2, the alarm response procedures have been ins!R-d and the integrated plant operating procedure will be revised prier to Unit i ici load.

Sincerely, i

l L

/

William J Ca 1, Jr.

J0P/GLM/tg c.

Mr. R. D. Martin, Region IV Resident inspectors. CPSES (2)

Mr. T.

A.

Bergman, NRR Mr. M. B. Fields. NRR Y

9110110004 911003 7]

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POR ADOCK 05000443 3

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y fOO 400 North Ohve Street LB. 81 Dallas, Texas 75201