ML20041F442
| ML20041F442 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 03/12/1982 |
| From: | Nichols T SOUTH CAROLINA ELECTRIC & GAS CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8203160503 | |
| Download: ML20041F442 (3) | |
Text
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SOUTH CAROLic A ELECTRIC a GAS COMPANY POST OFFICE 802 764 CotuMe A, SOUTH CAROLINA 29218 T. C. NicHo Ls, J a.
wcs Passiosni amo Gwe DgcuYrrs March 12,. 1982 NucatAa Opraatioses Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, DC 20555
Subject:
Virgil C. Su.nmer Nuclear Station Docket No. 50/395 Control Room Ventilation
Dear Mr. Denton:
In amendment 22 of the Virgil C. Summer Nuclear Station FSAR, a description of a modification to the control room ventilation system was provided.
In a review meeting on technical specifications we discovered a need to amend another page in the FSAR. A marked up change of page 6.4-9 is attached.
This will necessitate a clarification in the SER (page 6-26, section 6.4.2) to note that the control room ventilation system is in a recirculation mode during normal and emergency conditions.
Finally, since the inventory and location of chlorine at the plant meets the requirements of Regulatory Guide 1.78 and the ventilation system is maintained in the recirculation mode, the proposed technical specification regarding chlorine detection system (3.3.3.11) is not applicable to the Virgil C. Summer Nuclear Station and should not be included.
If you have any questions, please let us know.
Very truly yours, Y,
,f T. C. Nichols, Jr.
i RBC:TCN:rh LO Attachment 1
cc: Page Two
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PDR ADOCK 05000395 E
Mr. Harold R. Denton March 12, 1982 Page Two cc:
V. C. Summer G. H. Fischer H. N. Cyrus T. C. Nichols, Jr.
M. B. Whitaker, Jr.
J. P. O'Reilly H. T. Babb
-D. A. Nauman C. L. Ligon (NRSC)
W. A. Williams, Jr.
R. B. Clary O. S. Bradham A. R. Koon M. N. Browne G. J. Braddick M. Virgilio J. C. Ruoff J. L. Skolds J. B. Knotts B. A. Bursey NPCF File 4
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6.4.1.3.2 Toxic Gas Protection
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The primary hazardous chemical onsite in sufficient quantities which warmNd
"*d-[$2! accidental releasersp;E;Yi ;e, it-j lirit in th ::;;;el r; s 1 ;;-' Ect:d :; k bottled chlorine.
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a c corat.ne e w a + k sk. eas.
. la rious a f Reg ola vory Cu,Je I, ?g eghlorine'T2s stored onsite in containers having a single container inventory of 150 pounds or less
" '- - -- d in the chlorine shed c
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adj acent to the water treatment building and is greater than 100 meters from the control room intake.
Indication of a chlorine leak is provided by chlorine leak detector located in the chlorine shed which annunci-ates an alarm locally and in the control room.
Capetf14 ty h - - el 3;
inc1;;ieu ofIhe control room ventilation system is described in Sec-I tion 9.4.1.
For discussion 6f postulated offsite hazardous chemical releases see Section 2.2.
6.4.1.3.3 Control Room Filtering System
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The general arrangement and control of the control room filtering systems are as described in Section 9.4.1.
Detailed information con-cerning the emergency filter is presented in Section 6.5.1.2.
The systems are shielded, housed in a Sesimic Category I structure, separ-ated, redundant and powered from the Class lE electrical system.
They are equipped with filters designed in accordance with the requirements of Regulatory Guide 1.52 (see Section 6.5.1 and Appendix 3A). No sin-gle failure results in loss of system function.
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Implementation of scheduled field testing, inspection, and maintenance programs ensure that each filtering system performs in accordance with design requirements.
6.4.1.3.4 Control of th'e Control Room Thermal Environment The control room air handling system operates during normal and emer-7,
gency periods to maintain an environment suitable for personnel and equipment. The conditions maintained and general system description l('
l An en Jn e~ r 31 6.4-9 l
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