ML19210A516
| ML19210A516 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 08/19/1977 |
| From: | Reid R Office of Nuclear Reactor Regulation |
| To: | Herbein J METROPOLITAN EDISON CO. |
| References | |
| NUDOCS 7910300555 | |
| Download: ML19210A516 (3) | |
Text
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NRC PDR AN (g $77 L POR ORB #4 Rdo.
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Petropolitan Edison Carpany hn hy ATTN: Mr. J. G. Herbein JRBuchanan Vice President ACRS(16)
P. O. Box 542 TCarter Reading, Pennsylvania 19603 y
Gentlemen:
By letter dated December 12. 1975 you requested amendment of Appendix B to Operating License No. DPR-50 for Three Mile Island Nuclear Generating Station, Unit No.1 (TitI-1). One of the channes requt sted would revise Section 2.3.1 to provide specific concentration linits for noble gases dissolved in liquid effluents.
Based upon the review completed to date, we conclude that we cannot grant the limits requested because we do not agree that the drinking water pathway is limiting. We further conclude, however, that based on the more conservative submersion exposure model, we probgbly will be able to approve a maximum concentration limit of 4 x 10-3 uCi/a1 for dissolved noble gases, provided one remaining consideration is resolved. This consideration relates to the effect of this chanac on offsite doses due to liquid effluents - particularly within the context of Appendix I to 10 CFR 50.
Specifically, Appendix B Specification 2.3.1.b places a ifmit on the total curies released per calendar quarter in liquid effluents, but e::cludes tritium and noble gases. Appendix I, on the other hand, states design objectives in tenns of an all inclusive annual radiation exposure dose, without exclusion of any isotooes.
Accordingly, in order to approve a change in the allowable discharge concentration for noble gases in liquid effluents, it must be demonstrated in addition to other considerations, that the change will not significantly increase the annual dose due to liquid effluents, frm all pathways of exposure received by persons in unrestricted areas.
1487 290 OPPIC E h gu msease t >
OaTE D Forma AEC-)l3 (Rev. 9 53) AECM 0240
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a i'etropolitan Edisen Conpany '
Therefore, in order for us to conclude our review, you should supoly information demonstrating that based on exnected discharges of liquid effluents, increasing the dissolved cas concentration limit from its present value to 4 x 10-5 uCi/n1 will not significantly increase the dose due to liquid effluents received by persons in unrestricted areas.
You are recuested to advise us within 20 days of receipt of this letter of your schedule for submitting the above infor ation.
Sincerely, Robert 'd.
Reid, Chief Operating Reactors Branch #4 Division of Operating Reactors cc: See next page 1487 291 m9/
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Metropolitan Edison Company cc:
G. F. Trowbridge, Esquire Shaw, Pittman, Potts & Trowbridge 1800 M Street, N. W.
Washington, D. C.
20036 GPU Service Corporation Richard W. Heward, Project Manager Thomas M. Crimins, Jr., Safety and Licensing Manager 260 Cherry Hill Road Parsippany, New Jersey 07054 Pennsylvania Electric Mmpany Mr. R. W. Conrad Vice President, Generation 1001 Broad Street Johnstown, Pennsylvania 15907 Mr. Weldon B. Arehart, Chainnan Board of Supervisors of Londonderry Township RFD#1, Geyers Church Road Middletown, Pennsylvania 17057 Miss Mary V. Southard, Chaiman Citizens for a Safe Environment P. O. Box 405 Harrisburg, Pennsylvania 17108 Government Publications Section State Library of Pennsylvania Box 1601 (Education Building)
Harrisburg, Pennsylvania 17126 1487 292