ML19338F763
| ML19338F763 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 09/19/1980 |
| From: | Moody D Maine Yankee |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| IEB-80-18, WMY-80-123, NUDOCS 8010270191 | |
| Download: ML19338F763 (2) | |
Text
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fx-N MAIRE ";iHARHEE AmmlC PWVER CCMPAMI e
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- g. MM ENGINEERING OFFICE WESTBORO, MASSACHUSETTS 01581 617-366-9011 B.4.1.1 WMY 80-123 Septe.sber 19, 1980 United States Nuclear Regulatory Commission Office of Inspection and Enforcement Region I 631 Park Avenue King of Prussia, Pennsylvania 19406 1
Attention:
Mr. Boyce H. Grier, Director
References:
(a) License No. DPR-36 (Docket No. 50-309)
(b)
USNRC Letter to MYAPC dated July 24, 1980; IE Bulletin No. 80-18
Subject:
Response to IE Bulletin No. 80-18, Maintenance of Minimum Flow Thru Centrifugal Charging Pumps Following Secondary Side High Energy Line Rupture
Dear Sir:
Your letter, Reference (b), revealed a potential problem with Centrifugal Charging Pump Minimum Flow during certain secondary plant transients. Maine Yankee has completed the necessary review and offers the following information, numbered to correspond with the Bulletin.
1.
A minimum flow bypass line is included in the Maine Yankee design which remains open in all modes of operation to guarantee that minimum cooling flow is provided even at shutoff head. All safety-related analyses assume the presence of this open line.
2.
No modifications are necessary.
3 No calculation required by question 1.
The following information is submitted in response to your request for estimates of manpower expended in the research and subsequent performance of actions associated with this bulletin:
Manpower Requirements Hours Bulletin Response 15 Manhours Corrective Actions Not Applicatle 8010270 [f/
U.S. Nuolear R:gulsttry Commissicn Septemb:r 19, 1980
'~ *'
Att0nti:n: Offico of Inspecticn cnd Enfcrcement Paga 2 Since no incremental improvement in safety will result from this action, the value of the Value/ impact would appear to be zero.
We trust this information is sufficient. Should additional information be required, plears 'leel free to contact us.
Very truly yours, MA7.NE YANKEE ATOMIC POWER COMPANY
. D.
D. E. Moody Manager of Operations ADR/kab 4
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