ML20045B320
| ML20045B320 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 06/10/1993 |
| From: | Broughton T GENERAL PUBLIC UTILITIES CORP. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| C311-93-2086, IEB-93-002, IEB-93-2, NUDOCS 9306170187 | |
| Download: ML20045B320 (2) | |
Text
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GPU Nuclear Corporation M
Uhlhhf ne Route 441 South g
P.O. Box 480 Middletown. Pennsylvania 17057-0480 (717)944-7621 Writer's Direct Dial Number:
717-948-8005 June 10, 1993 C311-93-2086 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555
Dear Sir:
Three Mile Island Nuclear Station, Unit 1 (TMI-1)
Operating License No. DPR-50 Docket No. 50-289 GPU Nuclear Response to NRC Bulletin 93-02, " Debris Plugging of Emergency Core Cooling Suction Strainers" NRC Bulletin 93-02 requested that licensees identify and remove fibrous air filters or other temporary sources of fibrous material, not designed to withstand a loss of Coolant Accident (LOCA), which are installed or stored in primary containment.
THI-l uses two permanently installed sources of fibrous material inside the Reactor Building: the Reactor Compartment Cooling Units (AH-E-2A/B) and the Reactor Building Cleanup Unit (AH-E-101). A third source of the material, the Steam Generator Outage Blowers / Filters, is secured (tied down) inside the Reactor Building during plant operation.
Each of these sources of fibrous material is enclosed within a plenum, located at elevations well above the LOCA flood level, and would not be adversely affected by LOCA jet impingement.
Therefore, it is unlikely that fibrous material would enter the TMI-1 Reactot Building Sump during a design basis accident.
No actions are needed to remove any fibrous air filter material permanently installed or currently stored in the THI-1 Reactor Building during operation.
Additionally, procedural controls ensure that any temporary sources of fibrous material brought into containment will not jeopardize proper Emergency Core Cooling System suction from the Reactor Building sump during a LOCA.
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Sincerely, os5 30' 88
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T.G.Brougfon
-S5 Vice President and Director, TMI-l gg MRK d<
Attachment 1
cc: Region I Administrator, NRC Senior Project Manager, THI-1, NRC q{
l o a.o Senior Resident Inspector, TMI-1, NRC g
GPU Nuclear Corporation is a subsidiary of Genera! Pubhc Utiht es Corporation u
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i ATTACHMENT.
'C311-93-2086-i METROPOLITAN EDIS0N COMPANY..
JERSEY CEN1RAL POWER AND LIGHT COMPANY PENNSYLVANIA ELECTRIC COMPANY GENERAL PUBLIC UTILITIES NUCLEAR CORPORATION Three Mile Island Nuclear Station, Unit 1 (THI-1) i Operating License No. DPR-50 Docket No. 50-289 GPU Nuclear Response to NRC Bulletin 93-02 This letter is submitted in response to NRC Bulletin 93-02, " Debris Plugging of -
Emergency Core Cooling Suction Strainers."
All statements contained.in this t
response have been reviewed, and.all such statements made and matter set forth therein are true and correct to the best of my knowledge.
T. G. Broughtobf
~
Vice President and Director, TMI-I i
Signed and sworn before me this 10 day of O M
, 1993.
l Bhu P@k:
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