ML20154C128

Forwards Revised Safety Evaluation Accepting Continued Use of Hafnium Hybrid Control Blades & Proposed Surveillance Program

ML20154C128
Person / Time
Site:	Big Rock Point File:Consumers Energy icon.png
Issue date:	09/07/1988
From:	Scott W Office of Nuclear Reactor Regulation
To:	Berry K CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
Shared Package
ML20154C132	List: ML20154C128 ML20154C138
References
TAC-68896, NUDOCS 8809140244
Download: ML20154C128 (3)

Text

- _____ _________ - _-__-__- -__________ ____

September 7, 1988 Docket No.: 50-155

Mr. Kenneth W. Berry Director, Nuclear Licensing Consumers Power Company 1945 West Parnall Road Jackson, Michigan 49201

SUBJECT:

BIG ROCK POINT, CONTINUED USE OF NUCOM HAFNIUM CONTROL BLADES (TAC NO. 68896)

By letter dated July 15, 1988, you provided a clarification of your April 28, 1988, submittal on the continued use of the NUCOM hafnium hybrid control blades. The clarification referred to Attachment 2 "Continued Surveillance i Program for NUCOM Control Blades at Big Rock Point " Although you discussed i "small differences in control blade weights" (between GE and NUCOM blades) in i an Attachment 2 section entitled Control Blade Weight, your clarification i stated that weighing is not part of the continued surveillance program.

j I Because there is considerable accumulated experience with hafnium control rods i and it has been established that they do not blister or suffer surface i

deformation with exposure (detectable by weighing), and because visual J inspection is part of the continued surveillance program, we find the clarified surveillance program acceptable.

I Accordingly, the Safety Evaluation (SE) issued with our subject letter dated l May 17, 1988, has been revised to remove reference to control blade weighing.

! The revised SE is enclosed.

l Sincerely, J -

, d d9 L'900dby Wayne E. Scott, Jr., Project Manager Project Directorate III-1 Div1 sion of Reactor Projects - III, J IV, V & Special Projects

Enclosure:

n As stated

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• • Yocket No. : 50-155 Mr. Kenneth W. Berry Director, Nuclear Licensing Consumers Power Company 1945 West Parnall Road Jackson, Michigan 49201

SUBJECT:

BIG ROCK POINT, CONTINUED USE OF NUCOM HAFNIUM CONTROL BLADES (TAC NO. 68896)

By letter dated July 15, 1988, you provided a clarification of your April 28, 1988, submittal on the continued use of the NUCOM hafnium hybrid control blades. The clarification referred to Attachment 2 "Continued Surveillance Program for NUCOM Control Blaces at Big Rock Point." Although you discussed "small differences in control blade weights" (between GE and NUCOM blades) in an Attachment 2 section entitled Control Blade Weight, your clarification stated that weighing is not part of the continued surveillance program.

Because there is considerable accumulated experience with hafnium control rods and it has been established that they do not blister or suffer surface deformation with exposure (detectable by weighing), and because visual inspection is part of the cortinued surveillance program, we find the clarified surveillance program acceptable.

Accordingly, the Safety Evaluation (SE) issued with our subject letter dated May 17, 1988, has been revised to remove reference to control blade weighing.

The revised SE is enclosed.

Sincerely, nojM Waynt E. Scott, Jr., Project Manager Project Directorate III-1 Division of Reactor Projects - III, IV, Y & Special Projects

Enclosure:

As stated cc w/ enclosure:

See next page J

. Mr. Kenneth W. Berry Consumers Power Company Big Rock Point Plant Cc' Mr. Thomas A. McNish, Secretary Consumers Power Company i 212 West Michigan Avenue '

Jackson, Michigan 49201 t

Judd L. Bacon, Esquire i Consumers Power Company (

212 West Michigan Avenue  !

Jackson, Michigan 49201  !

Mr. Thomas W. E1 ward l Plant Manager  !

Big Rock Point Plant  !

10269 U.S. 31 North '

Charlevoix, Michigan 49720 I Mr. Bud Heeres t County Commissioner  ;

303 Sheridan Charlevoix, Michigan 49720 4 l Office of the Governor i Room 1 - Capitol Building I Lansing, Michigan 48913 t

Regional Administrator, Region !!!

U.S. Nuclear Regulatory Commission 799 Roosevelt Road i Glen Ellyn, Illinois 60137 i Nuclear Facilities and Environmental Monitoring Section Office  !

Division of Radiological Health P. D. Box 30035  !

Lansing, Michigan 48909 I t

U.S. Nuclear Regulatory Commission

Resident Inspector Office Big Rock Point Plani

) }

10253 U.S. 31 North

• Charlevoix, Michigan 49720 I i

u l h j  !

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