ML062720140

Correction Letter to Generic Letter 96-06, Assurance of Equipment Operability and Containment Integrity During Design-Basis Accident Conditions Response

ML062720140
Person / Time
Site:	Clinton
Issue date:	09/20/2006
From:	Simpson P AmerGen Energy Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
GL-96-006, U-603782
Download: ML062720140 (2)

Text

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An Exelon Company Clinton Power Station R. R. 3, Box 228 Clinton, IL 61727 U-603782 September 20, 2006 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Clinton Power Station, Unit 1 Facility Operating License No. NPF-62 NRC Docket No. 50-461

Subject:

Correction Letter to Generic Letter 96-06, "Assurance of Equipment Operability and Containment Integrity During Design-Basis Accident Conditions" Response

References:

(1) NRC Generic* Letter 96-06, "Assurance of Equipment Operability and Containment Integrity During Design-Basis Accident Conditions," dated September 30, 1996 (2) Letter from Wilfred Connell (Illinois Power) to USNRC, dated January 28, 1997, "Clinton Power Station 120-Day Response to Generic Letter (GL) 96-06, 'Assurance of Equipment Operability and Containment Integrity During Design-Basis Accident Conditions"'

(3) Letter from Michael T. Coyle (Exelon/AmerGen) to USNRC, dated December 18, 2000, "Clinton Power Station Response to NRC Requests for Additional Information Regarding Generic Letter 96-06" This letter provides corrected information on two containment penetrations at Clinton Power Station (CPS) that were addressed as part of the CPS response to Generic Letter 96-06, "Assurance of Equipment Operability and Containment Integrity During Design-Basis Accident Conditions."

Generic Letter 96-06 (Reference 1) requested that licensees determine:

(1) if containment air cooler cooling water systems are susceptible to either waterhammer or two-phaseIf low conditions during postulated accident conditions; and (2) if piping systems that penetrate the containment are susceptible to thermal expansion of fluid so that overpressurization of piping could occur.

r qx AmerGen Energy Company, LLC Clinton Power Station U-603782 Page 2 of 2 Reference 2 provided the CPS 120-day response and Reference 3 provided the response to an NRC Request for Additional Information regarding Generic Letter 96-06.

Reference 2 provided information on two fire protection (FP) penetrations, 1 MC-081 and 1 MC-082, indicating that air chambers were added.

Reference 3 provided information on these two FP penetrations that stated, "Line is not water filled during normal operation. The process fluid is steam or air, or the penetration is spare, or it is abandoned."

Both penetrations are water filled with air chambers installed, as described in Reference 2.-

Reference 3 should have described these two penetrations as "A relief valve or expansion chamber is installed between the isolation valves, or an air operated globe valve provides pressure relief."

The above information resolves a discrepancy between Reference 2 and Reference 3 in response to Generic Letter 96-06.

No new regulatory commitments are established by this submittal. If you have any questions or require additional information, please contact Mr. R. S. Frantz at (217) 937-2813.

Re**spectfl Patrick R. Simpson Acting Regulatory Assurance Manager Clinton Power Station EET/blf Attachment cc:

Regional Administrator, NRC Region III NRC Project Manager, NRR - Clinton Power Station NRC Senior Resident Inspector - Clinton Power Station