ML20237G214

From kanterella
Jump to navigation Jump to search
Forwards Rev 5 to Div Sys Description 3525-014, Dewatering Sys for Defueling Canisters. Changes Include Addition of Miscellaneous Waste Holdup Tank,Use of Water or Argon Backflush & Increase to Cover Gas & Dewatering Pressures
ML20237G214
Person / Time
Site: Three Mile Island Constellation icon.png
Issue date: 08/17/1987
From: Standerfer F
GENERAL PUBLIC UTILITIES CORP.
To:
NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
Shared Package
ML20237G217 List:
References
0045P, 4410-87-L-0120, 4410-87-L-120, 45P, NUDOCS 8708240007
Download: ML20237G214 (2)


Text

_ _ _ _ _ _ _ _ _ _ _ _ _ -. _ _ _ _ _ _ _ _ . _ . _ _ - . __ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

e GPU Nuclear Corporation g gf Post Office Box 480 Route 441 South Middletown, Pennsylvania 17057-0191 717 944 7621 TELEX 84 2386 Writer's Direct olal Number:

(717) 948-8461 4410-87-L-0120 Document ID 0045P August 17, 1987 US Nuclear Regulatory' Commission Attn: Document Control Desk Washington, DC 20555 Oear Sirs:

Three Mile Island Nuclear Station, Unit 2 (TMI-2)

Operating License Nu. DPR-73 Docket No. 50-320 Annual Update of the System Description for the TMI-2 Defueling Canister Dewatering System Pursuant to NRC letter dated February 4, 1982, the annual update to the System Description for the TMI-2 Defueling Canister Dewatering System is forwardeo for your information. This update, which constitutes Revision 5, includes the following changes:

o The Miscellaneous Waste Holdup Tank has been added as a transfer path for dewatering system effluent.

o The ability to use water and/or argon to backflush has been added, o The cover gas pressure has been increased to 13-15 psig and the dewatering gas pressure has been increased to 40 psig.

o The canister pressure check has been revised to indicate that the canister is monitored for ten (10) minutes after removal of the relief valves, o The flexibility to rewet the filter media using a backfill from DS-T-1 has been added, o Installation of check valves V063A and V0638 to prevent the backflow of contaminated liquid into the argon manifold.

8708240007 e70a17 0\

PDR ADOCK 05000320 h0 U

P PDR GPU Nuclear Corporation is a subsidiary of the General Public Utilities Corporation I\

l Document Control Desk August 17, 1987 .i 4410-87-L-0120 i

) !

o The Canister Handling and Preparation for Shipment Safety Evaluation Report'has been added as a reference. {

The above changes reflect operational changes to the system that are designed to increase the operational efficiency of the system. i l

i Sincerely, F. R. Stander er Director, TMI-2  ;

FRS/RDW/eml  !

Attachment l l

cc: Regional Administrator, Region 1 - W. T. Russell f Director, TMI-2 Cleanup Project Directorate - Dr. W. D. Travers i

l l