ML20154M089
| ML20154M089 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 03/05/1986 |
| From: | Travers W Office of Nuclear Reactor Regulation |
| To: | Standerfer F GENERAL PUBLIC UTILITIES CORP. |
| References | |
| CON-NRC-TMI-86-022, CON-NRC-TMI-86-22 NUDOCS 8603130316 | |
| Download: ML20154M089 (3) | |
Text
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DISTRIBUTION:
DN 50-320 NRC PDR Local PDR DCS j
TMI HQ r/f TMI Site r/f March 5',1986 WDTravers NRC/THI 86-022 MTMasnik i
RHall RCook CCowgill Docket No. 50-320 LChandler l
IE ACRS Mr. F. R. Standerfer M-town Office-Vice President / Director, THI-2 Service List GPU Nuclear Corporation P. O. Bax 480 l
Middletown, PA 17057
Dear Mr. Standerfer:
By a letter dated January 23, 1986, you subsitted a Safety Evaluation Report (SER) for Reactor Building (RB) Sump Criticality. Based on our initial review L
of the SER and discussions held between GPUN and the THI-2 Cleanup Project Directorate staff on February 27, 1986, we have detemined that we need additional infomation to complete our review. We request that you respond to the enclosed questions.
Sincerely,
/s/ C. Cowgill for William D. Travers Director r
THI-2 Cleanup Project Directorate
Enclosure:
As stated cc:
T. F. Demitt R. E. Rogan S. Levin W. H. Linton J. J. Byrne i
A. W. Miller Service Distribution List (See attached) 1 l
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ENCLOSURE 1.
What information is available regarding the amount of fuel under the reactor vessel? What further information gathering do you plan and what is the schedule for gathering this information?
2.
Page 8 of your SER states that "no known mechanism is available for establishing flow across the basement floor". How do you discount the force of steam /two phase flow from the RCDT as a driving force and the flow from decontamination spray water?
3.
What data demonstrates that molten fuel did not penetrate incore instrument guide tubes and drop into the sump with the remainder of the molten material re-solidifying and sealing the leakage path?
4.
By what method would you detect an inadvertent criticality in the sump?
5.
If an inadvertent criticality occurred what remediant actions are available?
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