ML20235H051
| ML20235H051 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 07/02/1987 |
| From: | Gallagher J PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Butler W Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-CR-3011 NUDOCS 8707140470 | |
| Download: ML20235H051 (3) | |
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PHILADELPHIA ELECTRIC COMF'ANY 2301 M ARKET STREET P.O. BOX 8699 PHILADELPHIA, PA,19101 (215) 841 5001 JOSEPH W. G ALLAGHER oEUl"."'."I"7...
July 2, 1987 Docket Nos. 50-277 50-278 Mr. Walter R. Butler Project Directorate I-2 Division of Reactor Projects I/II U.S. Nuclear Regulatory Commission ATTN: Document Contrcl Desk Washington, D.C.
20555
SUBJECT:
Peach Bottom Atomic Power Station Alternate Emergency Operations Facility Dose Assessment System
REFERENCE:
Letter to J. Stolz (NRC) from S. L. Daltroff dated 1/11/84 Letter to J. Stolz (NRC) from S. L. Daltroff dated 7/20/84
Dear Mr. Butler:
This letter describes the Peach Bottom Dose Assessment System which is available for use at the Alternate Emergency Operations Facility for the Peach Bottom Atomic Power Station.
This facility is located at the West Grove Service Building.
This information was requested by the Nuclear Regulatory Commission Project Manager, Mr. R.
E.
Martin, in a telephone conversation between himself and Ms.
R. A. Kankus (Philadelphia Electric Company) on June 12, 1987.
The Peach Bottom Dose Assessment System at the I
Alternate Emergency Operations Facility will consist of a portable Compaq 286 Computer and a portable Epson printer.
In the event that the primary Emergency Operations Facility becomes uninhabitable, the Compaq 286 computer and Epson printer will be transported from the primary Emergency h
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l Mr. Walter R.
Butler July 2,-1987 Page 2 l
Operations Facility to.the Alternate Emergency Operations-Facility at the West Grove Service Building. -The total _ time needed to. transport and to setup the computer.and printer is
'less than one hour. -While personnel are in transit between the two locations, offsite dose projections and protective action recommendations will be supplied by personnel located in the control. room using equivalent computer hardware and software.
The Peach Bottom Dose Assessment System is based on the Mesorem Jr. Atmospheric Dispersion and Dose Assessment Model.
This. system was designed to satisfy the requirements of 10CFR Part 50 Appendix E, entitled " Emergency Planning and Preparedness for Production and Utilization Facilities" and'the guidance of NUREG/CR-30ll, entitled " Dose Projection
{
Considerations at Nuclear Power Plants".
j This system provides a means for.immediate dose assessment utilizing the Pasquall-Gifford-Turner turbulence typing methodology.
Additionally, the.model provides.
calculations for-tracking the plume and its resultant doses up.to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> following the release.
The, Peach Bottom Dose Assessment System utilizes I
two modes for calculating dispersion values for projecting offsite radiation doses.
Mode A is a straight line Gaussian model which is based on equations provided'in Regulatory Guide 1.145'.
Mode B is a Lagrangian Puff model (variable trajectory) and is'an adaptation of NUREG/CR-344, "MESOI Version 2.0".
The. Peach Bottom Dose Assessment System's design criteria along with test case development and results are documented and maintained at the Philadelphia Electric Company's corporate offices.
The system was reviewed by NRC Region I and Headquarters personnel during a special inspection in September, 1986.
The results of this inspection were that the system was adequate, t
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Mr. Walter R. Butler July 2, 1987 Page 3 i
i If you have any questions or require additional information, please do not hesitate to contact us.
Very truly yours, cc:
Addressee T.
P. Johnson, Resident Site Inspector I
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