ML18033B088
| ML18033B088 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 12/19/1989 |
| From: | Black S Office of Nuclear Reactor Regulation |
| To: | Kingsley O Tennessee Valley Authority |
| References | |
| TAC-00155, TAC-00156, TAC-00157 NUDOCS 8912210014 | |
| Download: ML18033B088 (6) | |
Text
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FN UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 December 19, 1989 Docket Nos. 50-259, 50-260 and 50-296 Nr. Oliver D. Kingsley, Jr.
Senior Vice President, Nuclear Power Tennessee Valley Authority 6N 38 Lookout Place 1101 blarket Street Chattanooga, Tennessee 37402-2801
Dear t1r. Kingsley:
SUBJECT:
CONTROL ROOII HABITABILITY-HAZARDOUS CHEMICALS (TAC 00155,
- 00156, 00157)
By letter dated June 27, 1983, the Tennessee Valley Authority (TVA or the licensee) provided new information concerning hazardous chemicals being shipped past the Browns Ferry Nuclear Plant.
These new data indicate a total of 124 yearly barge shipments of potentially hazardous chemicals as defined in, Regulatory Guide 1.78 (Assumptions For Evaluating The Habitability of a Nuclear Power Plant Control Room During a Postulated Hazardous Chemical Release).
Regu-latory Guide (RG) 1.78 outlines thresholds of accident analyses based upon accident probability.
For barge traffic, RG 1.78 establishes a threshold for further evaluation based upon an accident probability established as 50 or more barge shipments of hazardous chemicals per year.
Therefore, the intent of RG 1.78 guidance is to direct licensees to perform specific accident evalua-tions if total hazardous chemical barge shipments exceed 50 per year.
When total barge sgiipments of hazardous chemicals exceed gg per year, as appears evident in your June 27, 1989 submittal, RG 1.78 directs licensees to consider both maximum concentration chemical accidents and maximum concentration-dura-tion chemical accidents for each source of hazardous chemicals to determine the potential affects on control room habitability.
In addition, your letter of June 27, 1989 did not discuss the quantity (weights) of hazardous chemicals per shipment as provided in RG. 1.78 guidance.
Typical chlorine shipments could exceed 200 tons.
In a previous submittal to the NRC on this subject (L. Hills, TVA to H. Denton, NRC, dated March 17, 1981),
analyses were summarized which indicated that an accident, where more than five tons of chlorine is vaporized might result in concentration in the control room exceeding the chlorine toxicity limit.
Based upon TVA's revised barge shipment data for Browns Ferry, further analyses of control room habitability, especially from potential chlorine release, are warranted.
Therefore, we request that TVA evaluate the release of chlorine and other toxic hazardous chemicals from a potential barge accident for control room habitabil-ity.
Your response is requested within 60 days of receipt of this letter.
The reporting and/or recordkeeping requirements contained in this letter affects fewer than ten respondents, therefore, OHB'clearance is not required.
. S912210014 891219 t.PDR.....,ADOCK 05000259 P
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Mr."Oliver D. Kingsley, Jr.
If you have questions concerning the above, please contact the Browns Ferry Project Manager, Gerald Gears at 301-492-0767.
Si neer ely, Original signed by Gerald E. Gears for cc:
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Mr: Oliver D. Kingsley, Jr.
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General Counsel Tennessee Valley Authority 400 West Summit Hill Drive ET 11E 33H Knoxville, Tennessee 37902 Hr. F. L. Moreadith Vice President, Nuclear Engineering Tennessee Valley Authority 400 West Summit Hill Drive WT 12A 12A Knoxville, Tennessee 37902 Dr. Hark 0. Medford Vice President and Nuclear Technical Director.
Tennessee Valley Authority 6N 38A Lookout Place Chattanooga, Tennessee 37402-2801 Manager.,
Nuclear Licensing and Regulatory Affairs Tennessee Valley Authority 5N 157B Lookout Place Chattanooga, Tennessee 37402-2801 Mr. 0. J. Zeringue Site Director Browns Ferry Nuclear Plant Tennessee Valley Authority P. 0.
Box 2000
- Decatur, Alabama 35602 Mr. P. Carier Site Licensing Manager Browns Ferry Nuclear Plant Tennessee Valley Authority P. 0.
Box 2000
- Decatur, Alabama 35602 Hr. G. Campbell Plant Manager Browns Ferry Nuclear Plant Tennessee Valley Authority 0.
Box 2000
- Decatur, Alabama 35602
- Chairman, Limestone County Commission P. 0.
Box 188
- Athens, Alabama 35611 Claude Earl Fox, M.D.
State Health Officer State Department of Public health State Office Building Montgomery, Alabama 36130 Regional Administrator, Region II U.S. Nuclear Regulatory Commission 101 Marietta Street, N.W.
Atlanta, Georgia 30323 Hr. Danny Carpenter Senior Resident Inspector Browns Ferry Nuclear Plant U.S. Nuclear Regulatory Commission Route 12, Box 637
- Athens, Alabama 35611 Dr. Henry Myers, Science Advisor Committee on Interior and Insular Affairs U.S.
House of Representatives Washington, D.C.
20515 Tennessee Valley Authority Rockvi lie Office 11921 Rockville Pike Suite 402 Rockville, Haryland 20852
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