ML19309E033
| ML19309E033 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 04/10/1980 |
| From: | Hovey G METROPOLITAN EDISON CO. |
| To: | Jay Collins NRC - NRC THREE MILE ISLAND TASK FORCE |
| Shared Package | |
| ML19309E034 | List: |
| References | |
| TLL160, NUDOCS 8004160290 | |
| Download: ML19309E033 (2) | |
Text
>I fT 8
Metropolitan Edison Company Post CMfice Box 480 g
Middletown, Pennsylvania 17057 717 9444041 Writer's Direct Dial Number April 10, 1980 TLL 160 THE Program Office Attn:
J. T. Collins, Deputy Manager U. S. Nuclear Regulatory Commission c/o Three Mlle Island Nuclear Station Middletown, Pa.
17057
Dear Sir:
Three Mile Island Nuclear Station, Unit II (TMI-2)
Operating License No. DPR-73 Docket No. 50-320 Submerged Demineralizer System At the present time there exists at TMI-II water in the containment sump and reactor coolant system containing isotopic concentrations in excess of 100 pCi/ml.
The decontamination of these waters is required in order that recovery operations may continue. This water exceeds the 100 pCi/ml design capability of the existing EPICOR-2 facility.
Enclosed, is our Technical Evaluation Report on the Submerged Demineralizer System (SDS), an ion exchange process that represents the method selected for decontamination of these waters.
This report documents the requirement for decontamination of these waters, as well as the engineering design of the proposed system to accomplish this objective.
Presently, the calculations that provide backup support for Chapters 6 and 7 are being prepared in a form that is suitable for submittal. These calculations will be submitted by approximately April 28, 1980.
Our present plans call for the initiation of processing contaminated waters by the SDS in October,1980. Our plan calls for processing the containment sump water first, prior to commencement of reactor coolant-system water cleanup. This water processing schedule has been developed to enable reduction of radiation exposure levels by a significant amount in the contain-ment building to minimize, as rapidly as possible, radiation exposure to personnel entering and working there.
As further information is obtained, and as containment building decontamination plans are developed, it may become necessary to add water to the containment sump as a result of gross decontamination of the building surfaces. Upon completion of containment 7c)j sump water processing for the reduction of the source term, cleanup of the reactor coolant system water will proceed in preparation for reactor vessel b
entry and fuel removal.
j/h 8 0 0 416 0 JA90
'ietrecchtan Ed. son Company rs a Member cf the Genera: Pubhc Utilities Systern l
- 1 1
J. T. Collins TLL 160 Other contaminated waters may be processed by the SDS upon completion of the reactor coolant system water cleanup if it is technically feasible and prudent to do so.
Details of plans for this additional water processing by the SDS will be forwarded for your information and approval as they are developed.
We believe the SDS represents an optimum system for decontamination of the containment sump water and reactor coolant system water. Your early approval for use of this system is requested.
Sincerely, G. K. Hovey Director, TMI-II GKH:LJL: hah Enclosure cc:
B. Snyder
.