IR 05000254/1993007
| ML20044C017 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 03/09/1993 |
| From: | Gardner R, Neisler J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML20044C016 | List: |
| References | |
| 50-254-93-07, 50-254-93-7, 50-265-93-07, 50-265-93-7, NUDOCS 9303160271 | |
| Download: ML20044C017 (4) | |
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U. S. NUCLEAR REGULATORY COMMISSION j
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REGION III
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Reports No. 50-254/93007(DRS); No. 50-265/93007(DRS)
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Docket Nos. 50-254; 50-265 Licenses No. DPR-29; No. DPR-30 Licensee: Commonwealth Edison Company Executive Towers. West III 1400 Opus Place, Suite 300 Downers Grove, IL 60515 Facility Name: Quad Cities Nuclear Power Station - Units 1 and 2 Inspection At: Cordova, IL 61241 l
Inspection Conducted: March 2 - 4, 1993 Inspector:
ed
/22/Ig 3-k- b H. Neid er'
Date-
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Approved By:
O k k.
O 3d-N R. h. Gardner, Chief Date Plant Systems Section l
Inspection Summary
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Inspection on March 2-4. 1993 (Reports No. 50-254/93007(DRS):
50-265/93007(DRS))
l Areas Inspected: Routine, announced inspection of the licensee's capability l
to cope with station blackout until alternate ac diesel generators are installed in December 1995. This inspection utilized procedure 37700.
l Results: The inspector. determined that Quad Cities has adequate procedures in place to deal with a station blackout event pending scheduled installation of alternate AC (AAC) diesel generators.
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DETAILS
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1.
Persons Contacted Principle Licensee Employees
- D. Bucknell, Technical Staff
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- T. Finnegan, Technical Staff i
- D. Kanakares, Regulatory Assurance, NRC Coordinator
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D. Luebbe, Technical Staff A. Misek, Supervisor, Regulatory Assurance
- H. Richter, Engineering and Construction U. S. Nuclear Reaulatory Commission (NRC)
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- T. Taylor, Senior Resident Inspector
- P. Prescott, Resident Inspector i
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- Denotes those persons attending the exit interview on March 4, 1993.
2.
Station Blacko.ut Response Procedure
The inspector reviewed Quad Cities procedure Q0A 6100-4, Revision 8, I
dated September 1992, " Station Blackout." This procedure provides instructions for shutting down safety equipment, verifying the position
of certain containment isolation valves, monitoring the condition of
station batteries and performing selective load shedding on the DC
electrical system. The procedure also has requirements for monitoring reactor water level, High Pressure Coolant Injection (HPCI)' and Reactor
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Core Isolation Cooling (RCIC) room temperatures, battery room i
temperatures, and for opening doors and providing temporary air. moving
equipment to the battery rooms to maintain hydrogen concentrations and
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room temperatures at acceptable levels.
In addition, the procedure contains instructions for regulating flow rates to maintain reactor vessel level and presstre with either HPCI or RCIC during the event and i
for the restoration of AC power when the emergency diesel becomes
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available. The inspector determined that the procedure was adequate to provide interim instructions for coping with a station blackout pending completion of the AAC power source installation.
Appropriate plant personnel have been trained in the latest approved revision to the station blackout procedure.
3.
Severe Weather Procedures The Quad Cities Station has reviewed and revised procedure Q0A 010-10,
" Tornado Warning / Severe Winds," Revision 6, dated September 1992. The procedure requires that upon receipt of a tornado / severe wind warning by the National Weather Service, plant personnel take steps to preclude or limit the probability of a station blackout due to wind damage. These steps include verifying the availability of all three diesel generators
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and transferring DC loads to batteries least susceptible to tornado i
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missile impingement. The inspector concluded that the procedure i
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i provided adequate instructions for plant response to severe weather
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conditions.
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4.
Cross Tie Between Buses l
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Installation of a cross tie between 4160 volt buses 13-1 and 23-1 is
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scheduled during the current Unit 2 refueling outage. This modification-
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will provide the capability to supply power to all safety related buses i
from the alternate AC power sources.
5.
AC Power Distribution The licensee has developed and implemented procedures for restoration of offsite power to Quad Cities and other Commonwealth Edison Company
nuclear stations. The procedures require that restoration of reliable l
offsite A.C. power supplies to the nuclear stations be given the highest
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priority to ensure adequate power for emergency control and reactor
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cooling.
In addition, the procedure states that repair crews trying to l
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restore power to nuclear stations should be given the highest priority for necessary manpower, equipment, and materials.
In the event of a station blackout, onsite power restoration would be accomplished using the plant's established procedures for abnormal electrical distribution system operation.
6.
Emeraency Diesel Generator (EDG) Reliability Proaram
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The licensee has developed a corporate EDG reliability program that
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provides guidelines for individual plant EDG reliability programs. The program incorporates the requirements of 10 CFR 50.63 and draft
Regulatory Guide 1.9 for monitoring EDG reliability.
Quad Cities i
Station is required to develop an EDG reliability program that includes EDG surveillance, condition monitoring of important EDG parameters, data systems to ensure availability of information, EDG maintenance, root cause evaluation, problem closeout to ensure resolution of EDG failures or problems and the determination and monitoring of EDG reliability against target trigger values. The licensee is committed to have the EDG reliability program implemented at Quad Cities by September 1,1993.
7.
Loss of Ventilation i
The inspector examined licensee procedure Q0A 5750-15, Revision 4, dated November 1991, " Complete loss of Control Room HVAC." This procedure delineates those activities to be accomplished upon loss of power to the control room and the auxiliary electric room. The licensee's station blackout review indicated that these were the only rooms where elevated temperatures could degrade components needed to cope with a total loss of AC power. Standby portable generators and temporary ventilation equipment have been purchased and placed in strategic locations near their point of use. The procedure identifies room and panel-doors to be
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opened to aid ventilation during a station blackout event.
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l The licensee's analysis indicates that temperatures in the RCIC room
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would not exceed design temperatures during a four hour loss of AC power.
8.
Exit Meetina The inspector met with licensee representatives (denoted in Paragraph 1)
at the conclusion of the inspection and summarized the scope and findings of the inspection. The licensee acknowledged the inspection findings. The inspector also discussed the likely informational content of the inspection report with regard to documents or processes reviewed
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by the inspector during the inspection.
The licensee did not identify any such document / processes as proprietary.
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