ML19343A194
| ML19343A194 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 09/04/1980 |
| From: | Hovey G METROPOLITAN EDISON CO. |
| To: | Jay Collins Office of Nuclear Reactor Regulation |
| References | |
| TLL-424, NUDOCS 8009160382 | |
| Download: ML19343A194 (3) | |
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Metropolitan Edison Company
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Post Office Box 480 kl N n
Middletown. Pennsylvania 17057 h
717 9444041
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Wnter's D. rect Dial Number September 4, 1980 TLL 424
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i TMI Program Office Attn:
Mr. John T. Collins, Deputy Director U. S. Nuclear Regulatory Commission c/o Three Mile Island Nuclear Station Middletown, Pennsylvania 17057
Dear Sir:
Three Mile Island Nuclear Station, Unit 2 (TMI-2)
Operating License No. DPR-73 Docket No. 50-320 Evaluation of EPICOR II Wastes This letter is forwarded in response to your letter #TMI-80-109, dated July 18, 1980.
In your letter, specific questions / comments concerning the Evaluation of Epicor II Wastes were discussed. The following comments apply:
Supply of Infomation The majority of the infomation requested in your letter, NRC/TMI-80-087, dated May 15, 1980, is considered proprietary by Epicor, Inc., who is the supplier of the Epicor II system in use at TMI-2.
All infomation that has been " released" by Ep ar, Inc., for further transmittal to the NRC has been forwarded.
Efforts are continuing to obtain additional information from Epicor to transmit to you.
As reported in earlier correspondence and during various meetings, as additional infomation becomes available it will be forwarded.
Details of Met-Ed Evaluation As pointed out in our letter TLL 316, dated July 2, 1980, the information pro-vided was based on preliminary evaluations.
In order to provide precise time related cause/effect type infor ation as requested by the NRC, it is necessary to complete this evaluation.
Since Met-Ed is also faced with proprietary re-strictions by Epicor, Inc., this evaluation has become more time consuming than originally projected. It is estimated this evaluation vill be ccmpleted by the end of September, 1980, at which time the results will be forwarded to the NRC.
Please note that we retain all avenues of communication with NRC and Brookhaven National Laboratory personnel open to insure you are appraised of the status of our evaluation and associated findings, in a timely fashion.
O/
Drawings 3
Full size liner drawings reproduced from the original mylar of both 4 X 4 and
/O 6 X 6 Epicor liners were hand delivered to your office on June 21, 1980. The reproductions attached to our July 2, 1980, letter were reduced to facilitate your handling, since you had already received full size clearly legible 8 0 0 916 0 3[*" " " * **
- '*#* U" TLL 424
. Jo.hn T. Collins drawings.
However, Attachment 1 provides full-scale engineering drawings of the 4 X 4 and 6 X 6 liners. These drawings have been updated to reflect all modifications. Attachment 2 contains fabrication drawings of these liners, which is considered proprietary by Epicor, Inc. is forwarded under separate cover. to this letter provides general liner internals layout which have been released by Epicor. Although these drawings do not provide the detailed fabrication information requested, they do provide an adequate conceptual lay-out of the internals.
Furthermore, it is recognized that the drawings for-warded as Attachment 3 do not satisfy all aspects of your request. However, these drawings of the liner internals are the only ones available to GPU.
Full size drawings of the Waste Staging Facility are attached as requested,.
Liner Fabrication Deatiled procedures used to fabricate the liners have recently been received from Epicor, Inc.
These procedures are forwarded under separate cover and are indicated as Attachment 5.
Concerning the liner internal paint application, the following discussion applies:
1.
Prefilters numbered 36 and above, second stage liners numbered 14 and above, and all third stage liners have been coated with Plasite 7155.
2.
Prefilters numbered 1-35 and second stage liners numbered 1-13 have been coarad with Phenoline 368.
Painting specifications were previously supplied in our letter, TLL 316, dated July 2, 1980.
Liner Surveys The radiation surveys on spent resin liners reflect deposited curies located within the resin bed.
This information was analyzed to project curie / cubic foot values from which integrated doses could be calculated.
In that the pre-cise resin loading is considered proprietary to Epicor, it is not possible to determine exactly what the exact distribution of ion exchange media within the liner is.
However, it was assumed that a maximum curie deposition has occurred over a very small volume of resin.
Since the vast majority of radio-isotopes are removed by cationic ion exchange, it was postulated that these regions contain either cation resin or zeolites. This method conservatively maximizes curies per given amount of resin, thereby establishing a maximum
" worst case" dose rate condition.
Although the supply of information has occurred in a " piece-meal" basis, it has been our intent to provide information as rapidly as possible. This method of j
information exchange has been necessitated because of the manner in which the
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information has been supplied to us.
John T. Collins TLL 424 s
It is our intent to continue to supply information as it is received. Ue remain available to discuss this rotter with you at your convenience.
Sincerely, 4
G. K. Hovey Director, DfI-2 GKil:LJL:lra Attachments 4-Dd cc:
- 3. J. Snyder
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