ML20069E526
| ML20069E526 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 03/11/1983 |
| From: | Wuller G ILLINOIS POWER CO. |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| References | |
| U-0613, U-613, NUDOCS 8303220088 | |
| Download: ML20069E526 (2) | |
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/LLINDIS POWER OOMPANY
- U-0613 Q
L30-83(03-11)-L 500 SOUTH 27TH STREET, DECATUR, ILLINOIS 62525 Docket Number 50-461 March 11, 1983 Director of Nuclear Reactor Regulation Attention:
Mr. A. Schwencer, Chief Licensing Branch No. 2 Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C.
20555
Dear Mr. Schwencer:
Clinton Power Station Unit #1 Containment Penetration Debris Screen Design CPS-SER Confirmatory Issue #53
References:
(1) IP Letter U-0592 from G. E. Wuller to A. Schwencer, January 17, 1983; " Containment Continuous Vent & Purge System."
(2) Meeting between IP and NRC, February 16-17, 1983; " Status of CPS SER Outstanding &
Confirmatory Issues."
The purpose of this letter is to provide the NRC Staff with information on the design and use of debris screens on containment penetrations associated with the Clinton Power Station (CPS) Containment HVAC Syctem.
Seven debris screens will be installed on piping at CPS.
One will be installed upstream of valve IVR01A on the 36" inlet line to the containment.
Another will be installed downstream of valve IVR001B on the same line.
This screen is in place
[
to protect the isolation valves in the event air flow is reversed due to containment pressure being higher than that in the i
ductwork outside the containment.
On the 36" exhaust line a screen will be installed upstream of valve IVQ004B.
Another screen will be installed on the 4" bypass line upstream of valve IVQ006B.
l l
The remaining three debris screens will be installed on the 12" HVAC system being installed as part of the continuous containment vent and purge modification as described in reference 1.
On the inlet line, one screen will be installed i
l upstream of containment outboard isolation valve IVR006A and I
another screen will be installed downstream of containment inboard isolation valve IVR006B.
On the exhaust line a screen i
I will be installed upstream of containment inboard isolation I
valve IVR007B.
8303220098 830311
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U-0613 L30-83(03-11)-L March 11, 1983 Page 2 The debris screens will be designed to the following criteria:
1.
Screens will be installed about one pipe diameter away from their respective valves.
2.
Screens will be seismic category I and will be able to withstand LOCA pressures.
3.
The piping between the valve and screen will be scismic category I.
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4.
The size of the openings in the debris screens will be approximately 2" by 1 3/16".
The above information on debris screens plus revised piping drawings will be incorporated into a future CPS-FSAR amendment about July 1983.
It is believed that the above information satisfies the agreement reached during our 2/16/83 meeting (Reference 2) with Mr. L. Ruth of the Containment Systems Branch and is
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therefore adequate to close CPS-SER Confirmatory Issue No. 53 in the next SER S'upplement.
Please let us know at your earliest convenience if you have any questions or concerns.
Sincerely, LA b /
G. E. Wuller Supervisor - Licensing Nuclear Station Engineering AJH/DLH/lt cc:
H. Abelson, NRC Clinton Project Manager L. Ruth, NRC CSB H. H. Livermore, NRC Resident Inspector Illinois Department of Nuclear Safety
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