05000302/LER-1984-023, Informs That Reevaluation of Alarms Listed in LER 84-023-01 Complete & Alarms Still Necessary.Alarms to Be Implemented on Main Plant Computer W/Readout on Video Screen Above Main Control Board by End of Next Refueling Outage

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Informs That Reevaluation of Alarms Listed in LER 84-023-01 Complete & Alarms Still Necessary.Alarms to Be Implemented on Main Plant Computer W/Readout on Video Screen Above Main Control Board by End of Next Refueling Outage
ML20215G541
Person / Time
Site: Crystal River Duke Energy icon.png
Issue date: 10/15/1986
From: Widell R
FLORIDA POWER CORP.
To: Stolz J
Office of Nuclear Reactor Regulation
References
3F1086-08, 3F1086-8, NUDOCS 8610200426
Download: ML20215G541 (2)


LER-2084-023, Informs That Reevaluation of Alarms Listed in LER 84-023-01 Complete & Alarms Still Necessary.Alarms to Be Implemented on Main Plant Computer W/Readout on Video Screen Above Main Control Board by End of Next Refueling Outage
Event date:
Report date:
3022084023R00 - NRC Website

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Florida Power C O R POR AT1ON October 15, 1986 3F1tl86-08 Mr. John F. Stolz, Director PWR Project Directorate #6 Division of PWR Licensing B Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555

Subject:

Crystal River Unit 3 Docket No. 50-302 Operating License No. DPR-72 Low Temperature Overpressure Protection Licensee Event Report 84-023-01

Dear Sir:

The cover letter for the subject Licensee Event Report dated February 10, 1986 described two alarms to prevent low temperature overpressurization events which Florida Power Corporation (FPC) committed to install in a letter dated January 5, 1978. These alarms were never installed. The February 10, 1986 letter indicated a re-evaluation of the need for these alarms would be conducted due to the extended period of time which had elapsed since the original commitment was made. That re-evaluation has now been completed.

The first of these alarms would actuate if the reactor coolant temperature were below 2800F and either the pilot operated relief valve (PORV) block valve were closed or the PORV key operated switch for the low pressure setpoint were not enabled. The study revealed there is an alarm to alert the operator when the PORV block valve is closed; however, there is no alarm or other mechanism to alert the operator when the key operated switch is not in the correct position.

The second alarm would actuate if the reactor coolant temperature were below 2800F and any of the breakers for the high pressure injection valves were not locked out. The study revealed there is no al arm or other mechanism to alert the operator of the existance of this condition, t

8610200426 861015 PDR P

ADOCK 05000302 PDR '\

i\g GENERAL OFFICE: 3201 Thirty fourth Street South

  • P.O. Box 14042
  • St. Petersburg, Florida 33733 * (813) 866-S151 \

A Florida Progress Company

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Cf r P October 15, 1986 3F1086-08 Page 2

'The study 'also evaluated .the basis for the need for these alarms as it

(. existed in 1978.. This basis was then . evaluated against current plant conditions 'and operating practice to determine the applicability of that:

basis today. . The conclusion . reached was that the conditions =which prompted FPC to commit to _ install these alarms in 1978 still ' exist. Therefore, FPC will install alarms which function similar to those described in our January '5,1978 letter for the PORV low pressure setpoint and the breakers for_ the' high pressure injection valves. The temperature setpoint will be changed from the 2800F originally committed to reflect the revised LTOP commitments described in the subject LER.

Our. current plans are to implement these alarms _ on the main plant computer:

with readout on a video screen above the main- control board. These alarms will be implemented before the end of. the next refueling outage- which begins in September 1987.

Should there be 'any questions, ~please contact this office.

Sincerely, +

Rolf k. Widell Manager, Nuclear Operations

. Licensing and Fuel Management:

AEF/feb xc: -Dr. J. Nelson Grace Regional Administrator, Region II Office' of Inspection and Enforcement U.S. Nuclear. Regulatory Connission 101 Marietta Street N.W., Suite 2900 Atlanta, GA 30323-