ML17179B031

Ack Receipt of Response to GL 92-04, Resolution of Issues Re Reactor Vessel Water Level Instrumentation in BWRs & Finds Listed Response Acceptable

ML17179B031
Person / Time
Site:	Dresden, Quad Cities, LaSalle
Issue date:	07/29/1993
From:	Stang J Office of Nuclear Reactor Regulation
To:	Farrar D COMMONWEALTH EDISON CO.
References
GL-92-04, GL-92-4, TAC-M84276, TAC-M84277, TAC-M84285, TAC-M84286, TAC-M84288, TAC-M84299, NUDOCS 9308180220
Download: ML17179B031 (6)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555--0001 July 29, 1993 Docket Nos. 50-237, 50-249 50-373, 50-374 and 50-254, 50-265 Mr. D. L. Farrar Manager, Nuclear Regulatory Services Commonwealth Edison Company Executive Towers West Ill, Suite 500 1400 OPUS Place Downers Grove, Illinois 60515

SUBJECT:

RESPONSE TO GENERIC LETTER 92-04, "RESOLUTION OF THE ISSUES RELATED TO REACTOR VESSEL WATER LEVEL INSTRUMENTATION IN BOILING WATER REACTORS," DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3, LASALLE NUCLEAR POWER STATION, UNITS 1 AND 2, AND QUAD CITIES NUCLEAR POWER STATION, UNITS 1 AND 2 (TAC NOS. M84276, M84277, M84285, M84286, M84298, AND M84299)

This letter acknowledges the receipt of your response to Generic Letter (GL) 92-04, dated September 28, 1992.

GL 92-04 was issued to all boiling water reactor (BWR) licensees on August 19, 1992.

The GL requested licensees to promptly assess the impact on their facilities of a potentially erroneous level indication due to non-condensable gases, and to implement compensatory measures and long-term corrective actions, as necessary.

Based on your response, we find the following acceptable:

1.

Commonwealth Edison Company's (CECo) review and acceptance of the BWR Owners' Group (BWROG) generic analysis as being applicable to Dresden, Units 2 and 3, LaSalle, Units 1 and 2, and Quad Cities, Units 1 and 2.

This acceptance by the NRC was made based on the current licensing basis for Dresden, Units 2 and 3, LaSalle, Units 1 and 2, and Quad Cities, Units 1 and 2, without any consideration of potential conservatisms.

2.

CECo's endorsement of the BWROG commitment as outlined in the BWROG letters dated August 12, 1992, and September 24, 1992, regarding schedule and plans for actions to address postulated errors in BWR water level instrumentation.

3.

CECo's endorsement of the BWROG Emergency Procedures Committee guidance letter dated August 19, 1992.

This letter provides guidance for operator action in the event of level indication errors due to non-condensable gases during reactor pressure vessel depressurization.

We also understand you have sensitized your operators to these potential errors consistent with the BWROG guidance.

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'1::.i OFC NAME DATE COPY Mr. D. The staff has determined that CECo's response is acceptable to address the short-term actions of GL 92-04.

GL 92-04 requested that long-term actions, including any hardware modifications, be completed at the first refueling outage starting three months after the date of the GL.

Your response indicated that CECo endorsed the BWROG program for assuring high functional reliability for the long-term, and that a schedule would be provided to the NRC in August 1993 if the BWROG program indicated that modifications were necessary.

Based on information reviewed from the BWROG test program, the staff determined generically that immediate compensatory measures and prompt hardware modifications were necessary to assure compliance with existing NRC rules and regulations.

The staff issued NRC Bulletin 93-03 (the Bulletin) on May 28, 1993.

The Bulletin requested hardware modifications be implemented at the next cold shutdown after July 30, 1993.

The long-term actions of the Bulletin are the same long-term actions requested in GL 92-04.

The staff will, therefore, complete its review of CECo's long-term actions once they are provided in accordance with the schedule established in the Bulletin.

This completes staff actions regarding GL 92-04.

Any additional review of the BWR reactor pressure vessel level instrumentation issue for Dresden, Units 2 and 3, LaSalle, Units 1 and 2, and Quad Cities, Units 1 and 2, will be conducted under a separate TAC for the Bulletin.

Sincerely, Original Signed By:

John F. Stang, Project Manager Project Directorate 111-2 Division of Reactor Projects - 111/IV/V Office of Nuclear Reactor Regulation cc: See next page DISTRIBUTION:

NRC & Local PDRs J. Dyer C. Patel B. Clayton RIII PD II 1-2 r I. ( 3)

C. Moore 3)

J. Roe J. Stang OGC

• R. Jon Doc File (50-237, 50-249, J. Zwolinski J. Kennedy ACRS (10) 50-373, 50-374, PM:PDIII-2 PM:PDill-2 JKENNEOY.J~

1 J. Cl if ford 50-254, 50-265)

D: POI 11-2 JOVER~

,.1 Mr. D. L. Farrar Commonwealth Edison Company cc:

Michael I. Miller, Esquire Sidley and Austin One First National Plaza Chicago, Illinois 60690 Mr. C. Schroeder Plant Manager Dresden Nuclear Power Station 6500 North Dresden Road Morris, Illinois 60450-9765 U. S. Nuclear Regulatory Commission Resident Inspectors Office Dresden Station 6500 North Dresden Road Morris, Illinois 60450-9766 Chairman Board of Supervisors of Grundy County Grundy County Courthouse Morris, Illinois 60450 Regional Administrator Nuclear Regulatory Commission, Region Ill 799 Roosevelt Road, Bldg. #4 Glen Ellyn, Illinois 60137 Illinois Department of Nuclear Safety Office of Nuclear Facility Safety 1035 Outer Park Drive Springfield, Illinois 62704 Robert Neumann Office of Public Counsel State of Illinois Center 100 W. Randolph Suite 11-300 Chicago, Illinois 60601

e.

Dresden Nuclear Power Station Unit Nos. 2 and 3

Mr. D. L. Farrar Commonwealth Edison Company cc:

Phillip P. Steptoe, Esquire Sidley and Austin One First National Plaza Chicago, Illinois 60603 Assistant Attorney General 100 West Randolph Street Suite 12 Chicago, Illinois 60601 Resident Inspector/LaSalle, NPS U. S. Nuclear Regulatory Commission Rural Route No. 1 P. 0. Box 224 Marseilles, Illinois 61341 Chairman LaSalle County Board of Supervisors LaSalle County Courthouse Ottawa, Illinois 61350 Attorney General 500 South 2nd Street Springfield, Illinois 62701 Chairman Illinois Commerce Commission Leland Building 527 East Capitol Avenue Springfield, Illinois 62706 Illinois Department of Nuclear Safety Office of Nuclear Facility Safety 1035 Outer Park Drive Springfield, Illinois 62704 Regional Administrator, Region III U. S. Nuclear Regulatory Commission 799 Roosevelt Road, Bldg. #4 Glen Ellyn, Illinois 60137 Robert Neuman Office of Public Counsel State of Illinois Center 100 W. Randolph Suite 11-300 Chicago, Illinois 60601 LaSalle County Station Unit Nos. 1 and 2 Robert Cushing Chief, Public Utilities Division Illinois Attorney General's Office 100 West Randolph Street Chicago, Illinois 60601 Michael I. Miller, Esquire Sidley and Austin One First National Plaza Chicago, Illinois 60690 Mr. G. Spedl LaSalle Station Manager LaSalle County Station Rural Route 1 P. 0. Box 220 Marseilles, Illinois 61341

Mr. D. L. Farrar Commonwealth Edison Company cc:

Mr.* Stephen E. Shelton Vice President Iowa-Illinois Gas and Electric Company P. 0. Box 4350 Davenport, Iowa 52808 Michael I. Miller, Esquire Sidley and Austin One First National Plaza Chicago, Illinois 60690 Mr. Richard Bax Station Manager Quad Cities Nuclear Power Station 22710 206th Avenue North Cordova, Illinois 61242 Resident Inspector U. S. Nuclear Regulatory Commission 22712 206th Avenue North Cordova, Illinois 61242 Chairman Rock Island County Board of Supervisors 1504 3rd Avenue Rock Island County Office Bldg.

Rock Island, Illinois 61201 Illinois Department of Nuclear Safety Office of Nuclear Facility Safety 1035 Outer Park Drive Springfield, Illinois 62704 Regional Administrator, Region III U. S. Nuclear Regulatory Commission 799 Roosevelt Road, Bldg. #4 Glen Ellyn, Illinois 60137 Robert Neumann Office of Public Counsel State of Illinois Center 100 W. Randolph Suite 11-300 Chicago, Illinois 60601 Quad Cities Nuclear Power Station Unit Nos. I and 2

.*'. '**. _'.~

Mr. D. L. Farrar

- 2.:..

The staff has determined that CECo's response is acceptable to address the short-term actions of GL 92-04.

GL 92-04 requested that long-term actions, including any hardware modi~icati.ons, be completed at the first refueling ~utage starting three

~

~onths after the date of the.GL.

Your response indicated that CECo endorsed

. the BWROG~rogram for assuring high functional reliability for the long-term, and that a schedule would be provided to the NRC in August 1993 if the BWROG program indicated that modifications were necessary~

'Based on information reviewed from the BWROG test pro.gram, the staff det~rmined generically that immediate compensatory measures and prompt

,hardware modifications were necessary to assure compliance with existing NRC rules _and regulations.

The staff issued NRC Bulletin 93-03 (the Bulletin) on May ~8, 1993.

The Bulletin requested har'dware modifications be implemented at "th~ next cold shutd~wn.~fter July 30, 1993.

The lorig-term actions. of the Bulletin "'are the same* long-term actions requested in GL 92-04.

The staff

-will, therefore,* _comp 1 ete its review of CECo' s 1 ong--term actions once they are

• provided in accordance ~ith th~ schedule established in the ~ulletin.

This complete~*sta(f actions regarding GL 92-04.. Any additional review of t~e BWR. reactot pressure vessel level instrumentation i~sue for Dresden, Units 2.

and* 3~.LiSalle, Units 1 and 2, and Quad C~ti~s, Units l and 2, *will be conducted. under a. separate TAC for. the Bull et in..

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cc: See next page Si ncere'ly, Original Signed By:

John F. Stan'g, Project Manager Project Directorate 111-2 Division of Reactor Projects - 111/IV/V Office of Nuclear Reactor Regulation

• DISTRIBUTION:

OFC NAME DATE COPY NRC & *Local PDRs J. Dyer C. Pat.el

• B. Clayton RII I PDIII-2 r/ * (3)

C. Moore 3)

• J. Roe

• . J. Stang OGC R: Jon Doc File (50-237, 50-249, J. Zwolinski J. Kennedy

• ACRS (10) 50-373, 50-374,

• J; Cl if ford 50-:254' 50-265).