U-602917, Updates Risks of Flammable & Toxic Hazards Associated W/Railroad Transportation Past CPS
| ML20202G920 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 02/11/1998 |
| From: | Sipek J ILLINOIS POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| U-602917, NUDOCS 9802200247 | |
| Download: ML20202G920 (2) | |
Text
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9 Ilknnis Power Company Chnton Power Staton P O Box 678 Chnton, IL 61727 Tel 217 935-8881 Joseph V. Sipek PGWER o = = ~ aa e mme ce U-602917 1 A.120 1
February 11, 1998 Docket No. 50-461 Document Control Desk Nuclear Regulatory Commission Washington, D.C. 20555 l
Subject:
Illinois Power Evaluation of Potential Transoortation Accidents l
Dear Madam or Sir:
j Illinois Power (IP) is providing this information in accordance with the Clinton j'
Power Station (CPS) Updated Safety Analysis Report (USAR), Section 2.2.3 which l
contains the commitment that every three years IP will assess the shipments of hazardous materials transported on the Gilman Line of the Illinois Central Railroad, located 0.75 miles north of CPS.
This letter updates the risks of flammable and toxic hazards associated with railroad transportation past CPS. At IP's request, the Illinois Central Railroad completed a survey of railroad traffic on the Gilman Line by review'mg their shipping records for the calendar year 1997. Hazardous materials are identified on the shipping record by a 49-series Standard Transportation Commodity Code (STCC) number. This code series includes flammable ar.d toxic materials.
The Illinois Central Railroad survey indicated that the only hazardous materials shipped past CPS during 1997 were 58 carloads ofphosphoric acid, STCC number 4930247. There were no shipments of flammable material on the Gilman Line in 1997.
The total number of hazardous material shipments on the Gilman Line decreased since the 1994 hazardous material survey was performed.
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U-602917 Page 2 1
As part of the evaluation of phosphoric acid, a review of Regulatory Guide 1.78, Revision 0, " Assumptions for Evaluating the Habitability of a Nuclear Power Plant Control Room During a Postulated Hazardous Chemical Release," indicated that liquids with a vapor pressure orless than 10 torr may be eliminated from further consideration as a risk to plant operation. Based on information provided by the consignee of the phosphoric acid, it was determined that the 58 cars contained undiluted phosphoric acid consisting of 70% phosphorus pentoxide. This materialis used to manufacture fertilizer.
The vapor pressure of a 100% concentration of phosphoric acid is less than 10 torr at 100 degrees Fahrenheit. Additional evaluation of the risk to plant safety from phosphoric acid therefore is not required.
The results of this assessment demonstrate that the risks associated with railroad transportation hazards remain acceptably low.
If you '
any questions or require additional information, please contact me.
Sincerely yours, I'L f
J sep V. Sipek irector - Licensing JSP/krk cc:
NRC Clinton Licensing Project Manager NRC Resident Office, V-690 -
Regional Administrator, Region III, USNRC Illinois Department of Nuclear Safety
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