ML20235E356

Forwards Info Re Availability & Reliability of HPCI Sys of Operating BWR Plants in Response to 720809 Request.Answer to Question 1 Provides Addl Info Concerning Times That HPCI Sys Have Been Out of Svc for Maint.W/O Encls

ML20235E356
Person / Time
Site:	Dresden, Quad Cities, 05000000
Issue date:	09/15/1972
From:	Butterfield L COMMONWEALTH EDISON CO.
To:	Morris P US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20235B311	List: IA-87-111, Submits Rept on Plant,As Discussed in ACRS 150th Meeting on 721012-14.Listed Items Can Be Resolved During Const & Facility Can Be Constructed W/Reasonable Assurance for Operation W/O Undue Risk to Public Safety IR 05000254/1972009 IR 05000358/1972003 IR 05000358/1973001 IR 05000358/1973002 IR 05000358/1973003 IR 05000358/1973005 IR 05000358/1973006 IR 05000358/1973007 IR 05000358/1974001 IR 05000358/1974002 IR 05000358/1974003 IR 05000358/1975004 ML20235B308 ML20235B364 ML20235B401 ML20235B405 ML20235B424 ML20235B456 ML20235B461 ML20235B465 ML20235B477 ML20235B488 ML20235B507 ML20235B552 ML20235B582 ML20235B585 ML20235B588 ML20235B605 ML20235B618 ML20235B623 ML20235B649 ML20235B656 ML20235B662 ML20235B670 ML20235B679 ML20235B683 ML20235B687 ML20235B702 ML20235B708 ML20235B713 ML20235B714 ML20235B718 ML20235B720 ML20235B730 ML20235B734 ML20235B748 ML20235B754 ML20235B762 ML20235B764 ... further results
References
FOIA-87-111 NUDOCS 8709280081
Download: ML20235E356 (1)

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Subject:

HPCI Operating-Jiieemerience DOCKET NOS. 50-237; 50-249; $0-254 50-265

Dear Dr. Morris:

4 The attached information is provided in response to your request of August 9, 1972 for information regarding the availability and reliability of the High Pressure Coolant Injection (HPCI) systems of operating BWR plants.

The information covers Dresden Units 2 and 3 and Quad-Cities Units 1 and 2 starting when the startup testing was completed on the HPCI system (~ 30% power).

The tabular answer to question No.1 also provides some additional information concerning the times that the HPCI systems have been out of service fc,r snaintenance.

Please note that the number of days out of service during shutdown may have been longer than was actually necessary to do the maintenance work.

We hope that the enclosed data will answer your concerns.

If further information is required, please do not hesitate to call on us.

m Very t?;uly yours, 0) w tn % A e

L. D. Butterfield, Jr.

-P13 N

• Nuclear Licensing Administrator

$$Yuf megn cum 5239 lC 8709280081 870921 PDR FOIA MENZ87-111 PDR

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