ML20069G961
| ML20069G961 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 10/14/1982 |
| From: | Davidson D CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| References | |
| TASK-2.F.1, TASK-TM NUDOCS 8210190333 | |
| Download: ML20069G961 (3) | |
Text
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R THE CLEVELAND ELECTRIC ILLUMIN ATING COMPANY P.o. box 5000 - CLEVELAND oHlo 44101 - TELEPHONE (216) 622-9800 - ILLUMINATING BLDG. - 55 PUBUCSoVARE Serving The Best Location in the Nation Dalwyn R. Davidson VICE PRESIDENT SYSTEM ENGINEERING AND CONSTRUCTION Mr. A. Schwencer, Chief Licensing Branch No. 2 Division of Licensing U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Perry Nuclear Power Plant Docket Nos. 50-440; 50-441 SER Confirmatory Items - 32 and 45 Radiation Monitoring
Dear Mr. Schwencer:
This letter and its attachments are provided in response to the Perry SER confirmatory items numbered 32 and 45 regarding accident monitoring instrumentation and the location of plant area radiation monitoring instrumentation. These items further address TMI action items II.F.1.3, II.F.1.4, II.F.1.5, and II.F.1.6 respectively and will be incorporated into a future FSAR amendment.
We believe that this information should resolve these confirmatory issues-in the next Supplementary Safety Evaluation Report (SSER No. 2).
Very truly yours, 2u Dalwyn R. Davidson Vice President System Engineering and Construction DRD:mb cc: Jay Silberg, Esq.
John Stefano Max Gildner M. Lamastra, NRC
- 3. Mauck, NRC Oh
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Attachment to letter dated 10/14/82--A. Schwencer Confirmatory items - 32 and 45 Confirmatory item No. 32: Additional accident monitoring instrumentation to TMI Action Plan items II.F.1.4, II.F.1.5, and II.F.1.6 (7.5.2.5).
Response
This issue requires the the accuracy of the containment pressure suppression pool water level, and containment hydrogen monitors be furnished in accordance with NUREG-0737.
The accuracy of the containment pressure suppression pool water level, and containment hydrogen monitors are as follows:
- 1) Overall accuracy of the containment pressure measurement is less than 1 1%.
- 2) Overall accuracy of the suppression pool water level monitors is less than + 1%.
- 3) Overall accuracy of the containment and drywell hydrogen monitors is - 1% to + 10% of the actual hydrogen concentration at the recorder readout.
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T; f.e Attachment to letter dated 10/14/82--A. Schwencer Confirmatory items - 32 and 45 j
Confirmatory item No. 45: Location of plant area radiation monitoring instrumentation.
(12.3.4)
Response
In accordance with TMI Action Plan item II.F.1.3, four high-range gamma monitors will be installed at Perry that meet the criteria of Table II.F.1.3 of NUREG-0737.
In addition the locations of the high-range monitors are provided as follows:
Two monitors are located in the Primary Containment (Drywell) at approximately core midplane, 630' elevation, spread about 32' apart centered at 270* azimuth for Unit I and 90' for Unit 2.
Two monitors are located in the Secondary Contain-ment (Reactor Building) at about the 689' level with a 30* spread about the 225' azimuth for Unit I and 135' azimuth for Unit 2.
This information is provided in lieu of plant layout drawings to more accurately define the location of the monitors.
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