ML19318A137

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Responds to NRC 800610 & 11 Requests for Info Re Containment Vent & Purge Sys.Licensee Will Install Stops to Limit Travel of 20 & 24-inch Containment Vent & Purge Sys Isolation Valves to Less than 50 Degrees Open
ML19318A137
Person / Time
Site: FitzPatrick Constellation icon.png
Issue date: 06/13/1980
From: Bayne J
POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To: Ippolito T
Office of Nuclear Reactor Regulation
References
JPN-80-29, NUDOCS 8006180499
Download: ML19318A137 (2)


Text

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POWER AUTHORITY OF THE STATE OF IJEW YORK to CoLUMeus CIRCLE NEW YORK. N. Y.10019 42123 397 6200 e GE0"f[,,Y;c ,E,nnY _,gp o.smat,ma orrican JOHN S.OYSON , .'cu ,vtvCE

""%'.",' f.O*,'.*,". I ceonor L. INGALLS

"" - "'" JOSEPH n. SCHMlEDEn n8CHAnD M. FLYNN

r';;;",,, i E NGI N E EN l no.Enr i. mitbo"n June 13, 1980 'Eaovyc,8,'",cA^Z,,,,,,,,  !

rnEoEn Cm n. CLAnic JPN-80-29  ;,cll;'f,""'"* l THOM AS n. FnEY Director of Nuclear Reactor Regulation  ;*,"l3l4ca ;"', *',=,'"'

U. S. Nuclear Regulatory Commission 1

Washington, D. C. 20555 Attention: Mr. Thomas A. Ippolito, Chief Operating Reactors Branch No. 3 Division of Operating Reactors

Subject:

James A. FitzPatrick Nuclear Power Plant Docket No. 50-333 Containment Vent & Purge System

Dear Sir:

This letter responds to verbal requests from the NRC on June 10 and 11, 1980 regarding the Containment Vent and Purge System (CVPS).

1. The Authority will install during the current refueling outage, stops to limit the travel of the 20 and 24 inch CVPS isolation valves to less than 500 open. Based upon the conservative analysis of valve capability provided with our letter of May 6, 1980, this limitation will result in a margin of available over required operator torque of 37% for the 24 inch valves and more than 100%

for the 20 inch valves. The Authority does not, however, ccknowledge the necessity of this limitation.

2. It is confirmed that keylock switches as well as administrative procedures are used to control the use of the " Emergency Manual Override" which overrides the isolation signals to the CVPS isolation valves. The Emergency Manual Override is discussed in detail in our letters of August 15, 1979 and March 19, 1980.
3. The commitments of-our letter of February 29, 1980 are revised as follows:
a. Response'to 2b The Authority will not use the " Emergency Manual /)oM 3 Override" when a real isolation signal is present

/!D 8006180 d p

mi without prior NRC approval. This will allow instrumentation surveillance testing without cycling of isolation valves. It should be noted that once an isolation signal parameter has cleared its setpoint use of the Emergency Manur1 Override is not required because the isolation signals may be reset and then the isolation valves moved as appropriate.

b. Response to 1, Item 3, last sentence Inerting and deinerting of the primary containment will be done using a single supply and exhaust line. This revised commitment will allow minimization of torus to drywell vacuum breaker cycling.

Very truly yours,

. . ffay71( ~

Senior Vice President Nuclear Generation

_ . _ ,