ML19320A180

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Responds to & 780227 License Amend Request Proposing Lengthening of Control Sys Isolation Time.Addl Info Required within 90 Days
ML19320A180
Person / Time
Site: Arkansas Nuclear 
Issue date: 03/13/1978
From: Reid R
Office of Nuclear Reactor Regulation
To: Cavanaugh W
ARKANSAS POWER & LIGHT CO.
References
NUDOCS 8004210484
Download: ML19320A180 (5)
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- Arkansas Power & Light Company CC' Phillip K. Lyon, Esquire House, Holms & Jewell 1550 Tower Building Little Rock, Arkansas 72201 Mr. Daniel H. Williams Manager, Licensing Arkansas Pcwer & Light Company Post Office Box 551 Little Rock, Arkansas 72203 Mr. John W. Anderson, Jr.

Plant Superintendent Arkansas Nuclear One Post Office Sox 608 Russellville, Arkansas 72801 Arkansas Polytechnic College Russellville, Arkansas 72801 5

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5 ARKANSAS NUCLEAR ONE, UNIT 1 DOCKET NO. 50-313 REQUEST FOR INFORMATION ON CONTROL ROOM T0XIC GAS PROTECTION A.

Provide an analysis of-the hazards to the cont'rol room operators from toxic gases stored on site. ' For guidance in your analysis, you may wish to refer to Regulatory Guides 1.78, " Assumptions for Evaluating the Habitability of a Nuclear Power Plant Control Room During a Postulated Hazardous Chemical Release," and 1.95, " Protection of Nuclear Power Plant Control Room Operators Against an Accidental Chlorine Release."

Your analysis of chlorine hazards on-site should include the following information:

1.

the location of chlorine storage on-site

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2.

the amount of chlorine stored in each montainer

' 3.

the number of chlorine containers 4.

the pressure in the chlorine containers assumed to leak or fail for this analysis 5.

the amount of chlorine released versus time 6.

the duration of the chlorine release

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7.

the outside dimensions of buildings at 'or near the chic *ine storage location, if yo.u account for dispersion in the building wakes 8.

the norizontal and vertical distances from the chlorine release point to the receptor (for example, the control room air intakes) 9.

the range of assumed wind speeds and atmospheric stability conditions 10.'

the outside dimensions of buildings between the release point and the receptor or near the receptor, if you account for dispersion in the building wakes e.

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11. the number, location and total response time (air sample traasit time, if any, to detector plus detector response time after contacting chlorine) of chlorine detectors at the chlorine storage site, in the control room, or in the control room air intake
12. where the alarms from the above mentioned detectors read out.

or annunciate

13. the conditions in which.one or more of the detectors at each of the locations mentioned in response to (11) above may be inoperable i
14. the normal control room air exchange rate
15. the air exchange rate of the isolated control room 16.

the control room volume

17. the control room air cleanup rate after isolation
18. the duration of chlorine intrusion prior to control room isolation (which includes chlorine intake prior. to the chlorine passing the detector, during the detector response time, and prior to closure of the isolation dampers)
19. the chlorine concentration versus time at the control room air intake
20. the chlorine concentration versus time in the control room B.

Provide a site drawing which shows the chlorine storage and the receptor-locations.

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