ML20064M648

Responds to Siting Analysis Branch Request for Addl Info Re PSAR Concerning Potential Highway Accidents W/Resulting Toxic Plumes That Could Impact Facility.Info Will Be Included in Future Amend of Chapter 2.2 of PSAR

ML20064M648
Person / Time
Site:	Clinch River
Issue date:	02/14/1983
From:	Longenecker J ENERGY, DEPT. OF, CLINCH RIVER BREEDER REACTOR PLANT
To:	Grace J Office of Nuclear Reactor Regulation
References
HQ:S:83:218, NUDOCS 8302150601
Download: ML20064M648 (4)

Text

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Department of Energy Washington, D.C. 20545 Docket No. 50-537 HQ:S:83:218 FEB 1: 1993 Dr. J. Nelson Grace, Director CRBR Program Office Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Dear Dr. Grace:

ADDITIONAL INFORMATION RELATING TO PRELIMINARY SAFETY ANALYSIS REPORT (PSAR)

CHAPTER 2.2 At the request of Mr. Charles Farrell, Nuclear Regulatory Commission Siting Analysis Branch, additional information is enclosed regarding potential highway accidents with resulting toxic plumes that could impact the Clinch River Breeder Reactor Plant. This infonnation will be included in Chapter 2.2 of the PSAR in a future amendment.

Questions regarding the information provided may be addressed to Wayne Hibbitts (FTS 626-6455) of the Project Office Oak Ridge staff.

Sincerely, do John R. Longenecker b Acting Director, Office of Breeder Demonstration Projects Office of Nuclear Energy Enclosure cc: Service List Standard Distribution Licensing Distribution poo l 8302150601 830214 PDR ADOCK 05000537 A PDR

ENCLOSURE

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Principal highway routes serving the CRBRP Site area are shown  ;

ci in Figure 2.2-3. One major highway, Interstate 40, passes approximate 1yE. n 1.25 miles south of the CRBRP Site, with interchanges at Tennessee Routes 58 and 95 at approximately four and three miles, respectively, from the .

plant site. Shipments to and from the industrial facilities described in D Section 2s2.1.1 would be conducted principally over the following routes:

to and from the ORGDP, State Route 58 (0ak Ridge Parkway) and Blair Road; to and from the ORNL, State Route 95 and Bethel Valley Road; to and from Y-12. Bear Creak Road off either Route 95 or Scarbo Road; Melton Hill Dam, Route 95 and Butte.rmilk Road and to/from the CRCIP, Route 58 and Bear .

Creek Road. The closest points at which shipments would pass the CRBRP .

occur at the CRCIP,1.5 miles and I-40,1.25 miles. Due to the distances .

involved, shipments to and from the industrial facilities of the Oak Ridge area will not impose potential adverse impact upon the CRBRP.

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Insert The nearest natural gas pipeline to the CRBRP is a six-inch line which borders the east boundary about one and a third miles away from the -l facility. This line runs north to south and supplies gas to Lenoir City, Tennessee Due to the remoteness of the pipe 1ine, no credible explosion of this Dioeline could adversely affect the CRBRP.

There are no stone quarries, oil. gasoline plants, or storage facilities near the CRBRP. Consequently, there are no potentia' effech of explos'on v fires from these facilities. The plant building complex is locatec a minimum of 300 ft. from the nearest tree line in any direction l Due to the separation between plant buildinas and the forest and the exten- '

4 sive use of fire retardant construction materials, a local forest fire I poses no threat to the integrity of the plant There will be no effect from chlorine gas leakage as none is i

' [ stored on site. Non-hazardous sodium hypochlorite is utilized for plant service instead of chlorine.

There are no on or off site airborne collutants that may affect plant components.

The closest commercial airport is the McGhee-Tyson (Knoxville) termina' 28 miles east southeast. Checking l;.5 flight information j ind' .ates that aircraft approaching McGheeJyson would be at a minimum altitude of 5000 feet as they pass 10 miles south of the site the closest a*rport is Meadowlake.10 miles southwest, which l nandles sport-type airc raf t. Therefore, as the CRBRP is not in the vicinity l

of airport flight holdinc patterns or flight oaths, the impact is considered to be minimal.

There are no tall structures such as natural-draft cooling towers i or tall discharge stacks on the facility which may damage critical equip-ment due to collapse. Discharae vents are located aporoximately 10 feet above the roofgrade Cooling structures utilized are wet mechanical draft 31 cooling towers. The dominant feature of the CRBRP is the Reactor Contain-Amend. 31 2.2-4b Hov. 1976 8

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INSERT 1

Estimates of frequent shipments of toxic materials on I-40 were obtained- from the Tennessee Public Service Commission (see Table 1

2.2.1). Calculations of concentrations of these materials in the CRBRP control room from an accident on I-40 show that hydrogen .

bromide and hydrogen fluoride could significantly exceed Threshold Limit Valves (TLV) assuming major releases and adverse meteorology. A hydrogen fluoride detector is presently included in the control room air intake system design. Further evaluation will determine the need for addition of a hydrogen bromide detector versus the acceptability of reliance on direct operator detection due to its low odor threshold.

Other toxic materials identified by the State which are frequently shipped on -I-40 are chloropicrin and acetic anhydride.

i Highly conservative calculations of control room concentrations t from accidents involving these materials resulted in exceeding l

l TLVs by caly 15% and 40% respe ctively. (Conservatisms included ,

l complete instaneous release of container contents, G stability, centerline concentration, 0.2 m/sec wind speed, the accident

( occurring at the closest proximity to the site, and a constant ,

i j wind direction with no meandering for about three hours.)

Detectors for these materials are thus not considered necessary for the control room air intake.

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Table 2.2.1.

Maximum Concentration Threshold Shipment Frequency of in Control Limit Toxic Chemical Weight (lb) Shipment (/wk)

• Room (mg/m3) Value (mg/m3)

Bromine 41,625 8 245 2 Hydrofluoric Acid 50,000 1 192 2 Chloropicrin 1,000 1 2.3 2 Acetic Anhydride 50,000 1 28 20 l

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• Estimate obtained from the Tennessee Public Service Commission (1982) .

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