ML20050B459
| ML20050B459 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 03/26/1982 |
| From: | Nichols T SOUTH CAROLINA ELECTRIC & GAS CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| RTR-REGGD-01.095, RTR-REGGD-1.095 NUDOCS 8204050353 | |
| Download: ML20050B459 (2) | |
Text
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March 26, 1982 40
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n Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation
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U. S. Nuclear Regulatcry Cownission N
Washington, D.C.
20555
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Subject:
Virgil C. Sumer Nuclear Station Docket No. 50/395 Control Room Ventilation
Dear Mr. Denton:
In our March 12, 1982 letter South Carolina Electric and Gas Coupany (SCE&G) provided a discussion of the control roczn ventilation system as it related to the chlorine detection technical specification.
In further discussions with Mr. Akstulawicz of the NRC on March 26, 1982, it was concluded that the existing design and analysis mets the requirenents of Regulatory Guide 1.95; therefore, no chlorine detection technical specification nor additional analysis is required.
A mrked up revision of FSAR page 6.4-9 is included to reflect reference to Regulatory Guide 1.95.
It will be included in the next FSAR cmendment.
If you have any further questions, please let us know.
Very truly yours,
~
T. C. Ni hols, Jr.
RBC:'ICN:lkb Attachment cc:
V. C. Summr (w/o attach.)
J. C. Ruoff G. H. Fischer (w/o attach.)
J. L. Skolds H. N. Cyrus J. B. Knotts, Jr.
T. C. Nichols, Jr.
(w/o attach.)
B. A. Bursey M. B. Whitaker, Jr.
NPCF J. P. O'Reilly File H. T. Babb D. A. Nauman C. L. Ligon (NSRC)
W. A. Williams, Jr.
R. B. Clary O. S. Bradham A. R. Koon p
go' M. N. Browne G. J. Braddick t
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- 6. 4.1. 3. 2 Toxic Gas Protection k-The primary hazardous chemical onsite in sufficient quantities which may under accidental iclease approach toxity limits in the control room is anticipated to be bottled chlorine.
xy sea.oejnea wstk + s, <- re e.o n ~ twdsno a s a4 gem C !. e f Rejul* rory Cuade I. 95 3l cghlorine is stored onsite in containers having a single container inventory of 150 pounds or less.
It is stored in the chlorine shed 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 a chlorine leak detector located in the chlorine shed which annunci-ates an alarm locally and in the control room.
Capability for manual isolation of the control room. ventilation system is described in Sec-tion 9.4.1.
For discussion of postulated offsite hazardous chemical releases see Section 2.2.
6.4.1.3.3 Control Room Filtering' System s
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.
In:plementation of scheduled field testing, inspection, and maintenance programs ensure that each filtering system performs in accordance with design requirements.
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6.4.1.3.4 Control of the Control Room Thermal Environment The control room air handling system operates during normal and emer-gency periods to maintain an environment suitable for personnel and
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equipment. The conditions u ntained and general system description
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