ML20125B502
| ML20125B502 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 10/27/1972 |
| From: | Tedesco R US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Muller D US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 7911130406 | |
| Download: ML20125B502 (2) | |
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OCT 2 7 1972 ENVinog' pgf-y Decket Nos. 50-289 (NEPA) 50-320 Daniel Muller, Assistaat Director for Environmental Projects, L RESPONSE TO AGENCY COMMEETS - THREE MILE ISLAND, UNITS 1 & 2
. Flaat Name:
Three. Mile' Island, Units 1&2
.JLicensing Stage!
OL & Feet CF Becket Numbers: 289/320
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' Responsible Branch:
Environmental Projects, No. 3 Proj ect Leader s ! ' W.' Regan
. w Requested Completion Date Met Scheduled Descripties of Response:
Response te Agamey Commenta Review Status:
Complete
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'As requested by W. Regan, we effer the following responses
' to somments from the Department of Health, Edmestion, and n
"lWelfare en the Three Mile Island Weelear Station radio-u
'setive weste handling systems.
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-t Comment-Sixty pareent of the liquid affluent, E excepted-,
in Table 6 of DES is.I-131.
The ER states sa average hold-up time of 14 days.
Why samaet the liquid effluent be held an additiemal 6' weeks, thereby reducing the 60E factor to 2.4% for I-1317
- Response-The I-131 releases previously reported resulted in deses of 8.4 aren/yr from eew-milk chain and
,2 ares /yr from drinking water.
Since the I-131
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releases in'the revised source term are smaller than previewely reported, the doses will be smaller and are aise acceptable.
We comelade e'
that.the releases.are as low as practiemble t,
sad that se additional waste storage tasks or treatment-are required.
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Comment 2-What is the afficiency of the polishing de-mineraliser for Cs-137 and Sr-90?
If the efficiency is not the maximum available for these astions, them final stage high efficiamey Cs and Sr exchange colunas shou.d ba installed.
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Damial Muller Resposse-Operating plaats have demonstrated tha' demiseraliser officiamey is a fumettom of water quali r.y, sampling method and operating somditions.
The s.3st important of these, bewever, is water quality.
The polishing domineraliser desentaminaties faster of 10 for Cs med Sr used is our evaluation for average water quality eenditions during the 40 year life of a uselaar plant.
The calculated Sr-90 releases from Units 1 and 2 and Cs-137 releases from Unit I are less them.000005 of the 10 CFR 20 limits.
The Co-137 release from Unit 2 is.00002 times 16 CFR 20, because of the assumpties in eer evaluaties that 10% of the sendemasta desimerslimer regenerate seisties is released untrasted.
This assumpties was made te redese the preesseing lead en the Misse11ameems Waste Evaporator to resseeable levels.
We somslade that the removal process for Cs-137 and Sr-98 in the liquid radweste system is adequate.
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Original signed byt
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. 1. L Tedesee, Assistant Direster s
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1 for Centaissent safety l
Directorate of Lissasing as L Siambasse W. McDema14
- s. Bamaser J. Wendrie R. DeYesag
- 3. Youngbleed J. Kastner T. Benareya W. Regan R. Smith DI ST RI BUTION4,k l
Docket (50-289/320)
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Porm AEC 318 (Rev. &53) AECM 0240 l
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