ML20207J543

Responds to IE Bulletin 86-002, Static 'O' Ring Differential Pressure Switches. Model 102 Pressure Switches Used in Turbine Bypass Valve Control Sys.Switch Outputs Provide Control Room Alarms.No Model 103 Switches Used

ML20207J543
Person / Time
Site:	Big Rock Point File:Consumers Energy icon.png
Issue date:	07/24/1986
From:	Berry K CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
IEB-86-002, IEB-86-2, NUDOCS 8607290159
Download: ML20207J543 (2)

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h ar licensing General Offices: 1945 West Pernall Road, Jackson, MI 49201 e (517) 788-1636 July 24, 1986 James G Keppler, Administrator Region III US huclear Regulatory Commission 799 Roosevelt Road Glen Ellyn IL 60137 DOCKET 50-155 - LICENSE DPR BIG ROCK POINT PLANT -

RESPONSE TO IE BULLETIN 86-02, STATIC "0" RING DIFFERENTIAL PRESSURE SWITCHES Inspection and Enforcement Bulletin 86-02 dated July 18, 1986 requires Consumers Power Company to submit a report within seven days on the extent to which SOR Incorporated Model 102 or 103 differential pressure switches are installed (or planned) as electrical equipment important to safety, as defined in 10CFR50.49(b).

Big Rock Point utilizes two model 102 and no model 103 differential pressure switches. These two switches are neither required to be qualified electrical equipment under EEQ nor subject to technical specification limiting conditions for operation and therefore the requirements of the bulletin are not applicable to Big Rock Point.

Both switches are in the turbine bypass valve control system. One monitors filter differential pressure and the other monitors accumulator pressure.

Outputs from both switches provide control room alarms. The concerns expressed in this bulletin relative to these two switches will be reviewed under our Operating Experience Review Program.

Y 'Ukwl Kenneth W Berry Director, Nuclear Licensing CC Director, Office of Nuclear Reactor Regulation Director, Office of Inspection and Enforcement NRC Resident Inspector - Big Rock Point OC0786-0119-NLO4

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o 4 CONSUMERS POWER COMPANY Big Rock Point Plant Docket 50-155 License DPR-6 lE Bulletin 86-02 At the request of the Commission and pursuant to the Atomic Energy Act of 1954 and the Energy Reorganization Act of 1974, as amended, and the Commission's j Rules and Regulations thereunder, Consumers Power Company submits our response to IE Bulletin 86-02 dated July 18, 1986, entitled, Static "0" Ring i Differential Pressure Switches. Consumers Power Company's response is dated July 24, 1986.

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CONSUMERS POWER COMPANY l

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F'W Buckman, Vice P %

Nuclear Operations Sworn and subscribed to before me this 24th day of July, 1986.

L lsts Elaine E Buehrer, Notary Public Jackson County i My commission expires October 31, 1989 i

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MIO786-0119-NLO4

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