ML20082H670

Discusses Annual Insp of Essential Svc Water Cooling Water Basin as Followup to 900129 Response to Generic Ltr 89-13. Bap 300-1, Conduct of Operations Will Be Revised to Recognize Desired Equipment Lineup for Annual Insp

ML20082H670
Person / Time
Site:	Byron
Issue date:	08/20/1991
From:	Schuster T COMMONWEALTH EDISON CO.
To:	Murley T NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), Office of Nuclear Reactor Regulation
References
GL-89-13, NUDOCS 9108260223
Download: ML20082H670 (2)

Text

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.- y C:mm:nwealth Edis n .

' - 1400 Opus Place

( 2 Downers Grove, HHnois 00515 l

August 20, 1991 ,

i Dr. Thomas E. Hurley, Director  ;

Office of Nuclear Reactor Regulation  !

U.S. Nuclear Regulatory Commission Washington, DC 20555 Attn: Document Control Desk ,

Subject:

Byron Station Units 1 and 2  :

Annual Inspection of the Essential Service t Hater Cooling lower Basin -

MC_DocheLNos m50-454_and_50-A55_

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References:

(a) October 29, 1986 letter from K. A. Ainger to H. R. Denton (b) November 23, 1988 letter from L. 01shan to H. Bliss  !

(c) Generic letter 89-13, Service Hater System Problems Affecting Safety-Related Equipment (d) January 25,, 1990 letter from H.H. Richter to USNRC .

Dear Dr. Hurley:

Conunonwealth Edison Company (CECO) provided a response to Generic Letter 89-13 (Reference c), for Byron Station in the letter of ,

Reference (d), To address the concerns regarding the accumulation of silt, sludge and debris within the intake structure of the Essential Service Water (SX) pumps, a commitment was made to perform an annual  !

inspection of the SX Cooling Tower Basins.

The performance of this inspection has essentially no affect on the operation of the SX system since the activity only involves an entry into the tower basins by a diver. However, in the interest of providing maximum protection for the diver it is preferable to place .

the SX pump control switches for the associated basin into the l " Pull-To-Lock" (PTL) position. for example, both the Unit I and Unit 2 l trein "A" pump control switches would be placed into the Pull-To-Lock position during the inspection of the "A" basin since they both take l suction from that basin. Limiting condition for operation action requirements will be entered for each pump placed in PTL, as dictated by each unit's operating status, In the 1986 letter of Reference (a),

as part of discussions and correspondence regarding the NRC approval of Amen ment 24 to the lechnical Specifications for Byron Units 1 and 2 it<eferences 2) CECO made a commitment regarding the use of one unit's SX pumps to support the emergency operation of the other Unit's SX system via the SX Unit cross-tie, This commitment states that one SX i pump from each unit will not intentionally be taken out-of-service for maintenance at the same time. >

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-Dr. Thomas E. Murley August 20, 1991 Although CECO considered the intent of the above commitment

-satisfied, while the-SX pumps were in PTL and could quickly and easily be restored to full service, the NRC was contacted on 10-16-90 to obtain their concurrence prior to the inspection activity. After several phone. conversations between Nuclear Licensing, Byron Station personnel and Region III/NRR personnel, verbal concurrence was obtained on.10-18-90 to proceed with the proposed inspection plan. The intent of this letter is to document this verbal concurrence such that future annual cooling tower basin inspections may be conducted without centinued licensing basis concerns. Byron Technical Staff procedure OBVS SX-5 contains the steps necessary to perform and document the annual inspection and has been revised to include !nformation that reflects the importance of maintaining the SX system in an operationally ready state, Also, BAP 300-1, Conduct of Operations, will be revised to recognize the equipment lineup desired for the annual inspection.

Please direct any. questions you may have concerning this matter to this office.

Respectfully, LUutA Y $ua W-T.K. Schu ter Nuclear Licensing AJministrator l

i cc: A. Hsia, Project Manager - NRR W. Kropp, Senior Resident Inspector - Byron A. Bert Davis, Regional Administrator - RIII ZNLD/1143/3 l

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