ML20148A560
| ML20148A560 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 12/21/1978 |
| From: | Herbein J METROPOLITAN EDISON CO. |
| To: | Reid R Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7812290086 | |
| Download: ML20148A560 (3) | |
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METROPOLI TAN EDISON COMPANY wxmiAnv or nauwusuc ununts covoaA U j
POST OFFICE BOX 542 RE ADING. PENNSYLVANI A 19603 TELEPHONE 215 - 929-3601 December 2 1, 1978 GQL 2031 Director of Nuclear Reactor Regulation Attention:
Mr. R. W. Reid, Chief Operating Reactors Branch No. b U.S. Nuclear Regulatory Commiasion Washington, D.C.
20555 Re: Three Mile Island Nuclear Station Unit 1 (TMI-1)
License No. DPR-50 Docket No. 50-289 Small Break LOCA Long Term Solution
Dear Sir:
Your letter of December 8, 1978 acknowledged our submittal of November 21, 1978 concerning our proposed Long Term Solution to the Small Break LOCA Problem, and indicated that our proposed solution has been reviewed by the appropriate IEC Technical Branches, and found acceptable.
Your letter of December 8,1978 also indicated that additional information is required in orde:? to justify installing the proposed solutler for TMI-l during the TMI-1 1980 refueling outage (as propoaed in our letter of November 21, 1978). In order to.,btain the justification necessary to allow installation of our proposed long-term solution, you requested that we address five (5) specific questions. These questions and our responses are attached.
Sincerely, l
[
J. G. Herbein
/ Vice-President Generation JGH:RAL:dlk
Attachment:
Responses to NRC Question Concerning Installation of Long-Term Solution to Small Break LOCA Problem cc:
G.
'wetzig (NRC) 7812,29008G L---_____--______-
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.Although a minimum of 30 days is required to perform the system 4-modifications,.if-enough materials have been received on site prior.to the 3979 TMI-1 refueling outage, some of the work may-be done during that outage. Therefore,' it may be possible to accomplish as much as nine days of work on the system modification during the 1979 TMI-1 refueling outage.
If this can be done, the minimum outage needed to install the modification could be reduced to 21_ days.
QUESTION #5 Provide the net ' increase in operating costs of the outage defined in 4, above.-
RESPONSE
The cost' of the capital improvement is $2hT.000.
If this improve-ment can be1 nstalled during the 1980 TMI-1 refueling outage, 1
there vill be no additional increase in operating costs.
If, e
however, a spe'cial outage is required to install this modification, the net additional increase in operating costs vill lie between
$8,6Th,600 and $12,36b,600 as follows :
J 30 Day Outage 21 Day Outage 3
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-Replacement energy costs'= $410,000 day
$12,300,000
$8,610,000
'd (Includes Reduced Capacity Penalty).
1 64,600 6h,600
-Costs of expedited schedule (as identified in'#3 above)
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TOTAL
$12,364,600
$8,674,600 Based on the info' nation presented above, we fiel that using all available ex-r pediting_ methods,' it is not possible to install the proposed modification prior j
to August 13, 1979 y
Because of the substantia 1' financial penalty associated with performing the modifications at some time other than a refueling outage, the { prudent) time for installing the modification is.during the 1980 TMI-1 refueling outage.
'As' indicated'in our response to question #h it is our intention to make every effort to install a portion 'of the req.uired modification during the TMI-1 1979 refueling outage.-
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Responses to-NRC Questions Concerning Installation of Long-Term Solution to Small Breaks LOCA Problem Question /1
. Provide earliest date by which you could be prepared to initiate implementation of the approved modifications at TMI-1 assuming a routine schedule for design and procurement.
Response
We have already.taken steps which go beyond those taken for a
" routine schedule for design and procurement." For example, we s.
have pre-ordered the valves, piping and pipe fittings which will te used in performing the modification. The long-lead time item for our schedule is the procurement of the Containment Penetration needed.for moving the normal make-up injection point to a 1ccation inside containment. In order to expedite procurement of this penetration, we have gcne beyond the " routine methods" by obtaining verbal quotations from several manufacturers.
In spite of these efforts.we cannot be prepared to initiate imp)ementation of-the approved modification at TMI-1 assuming a " routine" schedule for design and procurement prior to October 8, 1979 Question #2 Provide as in 1 above' assuming use of "special orders," and other measures as available to expedite preparations to the maximuta extent possible.
Response
In addition to the unusual methods already taken (as described in our response to #1 above). the other "special methods" which could i
be employed to expedite preparations vould be to justify one of the penetration manufacturers as a " sole-source supplier," and to delete j
the bid evaluation period. Taking these methods into consideration, the earliest possible date by which we are prepared to initiate implementation of the approved modification at TMI-l is August 13, 1979 Question #3 Provide the extra cost of the expedited schedule as compared to the routine schedule.
Response
The additional cost of the expedited schedule as compared to the routine schedule is $64,600. This cost includes such things as material charges, expediting, and additional manhour costs (overtime).
Question #h Provide the minimum duration outage necessary to implement the approved modification and perform the necessary testing.
Response
The minimum duration outage necessary*to implement the modification and perform the necessary testing is 3C days.
Included in this-30 day time frame are the cool-down and heat-up times. Also, this 30 day period includes. time allocated for testing in the following areas:
A) ) Hydrostatic testing.
B) Flow verification tecting (h separate tests)
C) Leak Rate testing D) Penetration Pressurization testing
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