ML19347F075
| ML19347F075 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 05/12/1981 |
| From: | Hovey G METROPOLITAN EDISON CO. |
| To: | Barrett L Office of Nuclear Reactor Regulation |
| References | |
| LL2-81-0134, LL2-81-134, NUDOCS 8105150197 | |
| Download: ML19347F075 (3) | |
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Metropoutan Edison Company f y' Post Office Box 480 Middletown. Pennsylvania 17057 Wnter's Direct Dial Numoer 4
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May 12, 1981 LL2-81-0134 t
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k5, TMI Program Office 5
Attn:
L. H. Barrett, Deputy Program Director ns U. S. Nuclear Regulatory Commission
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[C" c/o Three Mile Island Nuclear Station
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Middletown, Pennsylvania 17057 m
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Dear Sir:
Three Mile Island Nuclear Station, Unit 2 (TMI-2)
Operating License No. DPR-73 Docket No. 50-320 Submerged Demineralizer System On May 8,1981 we submitted to you our processing strategy plan for SDS operations (LL2-81-0108). On page 5 of the letter and page 2 of 3 of the attachment to the letter typographical errors exist.
Replacement pages are transmitted herewith.
Sincerely, K
G. K. Hovey Vice-President and Director, TMI-2 GKH:LJL:djb Attachments cc:
Dr. B. J. Snyder, Program Director, TMI Program Office EYI i
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!.'e: ccohtan Ed: son Company is a P.*emoer of !"e General Pubhc Utihties System
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Lake H. Barre tt LL2-81-0108 The leakage collection subsystem of SDS will be in operation during SDS processing to cleanup the water in the leakage containment boxes around the SDS liners and to minimize the overall buildup of activity in the "B" Spent Fuel Pool.
It is currently planned to load the leakage containment ion exchangers with organic resin to improve resin pe rformance at the high flow rate through the beds (i.e. 50 gpm).
It is our objective to operate this system to limit total curie deposition in these beds to permit shallow land burial in a dewate red condition. A key assumption of this total curie deposition is that only isotopes with half-lives greater than 5 years need be considered in dete rmining whethe r disposal in the dewate red condition is allowable. This is GPU's understanding of current and probable future commercial shallow land disposal site license conditions and the manner in which they are and will be interpreted. Based upon this objective, it appears that a typical leakage containment ion exchange vessel can remain in-service for about 5 weeks without changeout. Samples will be f requently taken to evaluate resin performance and curie loadings.
If there is unanticipated pool leakage resulting in higher (i.e., greater than 1 pCi/cc) ion exchange media loading, or if the service life is calculated to be so short that f re que nt changeout results in increased waste volume, then the ion exchange media will i
be allowed to load to less than 10 Ci/f t3 and alte rnate me thods for waste disposal (i.e., high integrity containers or solidification) will be employed.1 Should inorganic material be used in the leakage containment ion exchanger, higher loadings than the above limit will be pe rmitted.
Reactor Coolant System (RCS) water processing through the SDS is not expected to differ greatly from processing reactor building sump water. Water f rom the RCS.will be held up in the tank farm for SDS processing, and the e f flue nt will be collected in a bleed tank.
We intend to commence processing with radioactively contaminated fluids that are significant1y' lower in activity than the Reactor Building sump water.
Because the lower activity wate r will have different chemical characteristics, we will not try to relate ion-exchange performance during this initial processing to later RB sump wate r processings. Howe ve r, implementation of this operational philosophy wilt permit accomplishment of the following obje ctive s :
1.
Perfcrm initial processing with low activity water to gain operator familiarity.
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2.
Pe rmit the collection of data to provide a realistic basis for the prediction of general area radiation levels during processing of the reactor building sump water and the Reactor Coolant System water.
3.
Reduce the flushwater invencory to pe rmit water management flexibility.
1 In the event disposal utilizing high-integrity containers is required, applicable regulations for the disposal of such material will be followed.
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sc pags 2 of 3 integrity container (HIC).
In the event that this is not practical, or results in excessive waste ge ne ration, curie loadings will be allowed to increase to less tnen 10 ci/f t3, based upoa organic resin usage, and burial will be in high integrity containers at shallow-land disposal s ite s.
1 LEAKAGE CONTAI! MENT LINERS :
It is intended that these liners will be loaded to less than 1 pCi/cc via administrative controls to pe rmit dewatered shallow land disposal without solidification or without use of 1igh integrity containers.
In the event that this is not practical, or results in excessive weste generation, curie loadings will be allowed to increase to less than 10 ci/ft3 (if they contain organic resins) and burial will be in high integrity containers at shallow-land disposal sites.1 SDS FILTERS:
From current information on suspended solids in the RB sump water, and the elemental and radioisotopic distribution in these suspended solids, we be lie ve that the operating limit on SDS filters will be mechanical performance (i.e., differential pressure) with little radioactivity deposition, including transuranics.
It is anticipated that these filters will be suitable for shallow land burial in commercial sites.
In the e ve nt that sampling or calculations show the contenta of any liner intended to be sent to shallow land burial to exceed the limit for transuranic nuclides the filters will be stored on-site until interim storage, possibly under the auspices of the DOE, can be arranged o f f-site.
It is assumed that material exceeding shallow land burial limits for transuranic nuclides will be placed in an ultimate disposal location, probably a geological repository, when such is establiished by the Fe de ral Gove rnme nt.
1 In the event disposal utilizing high-integrity containe rs is required, applicable regulations for the disposal of such material will be followed.