JAFP-89-0141, Advises of Actions Taken by Util in Response to NRC Bulletin 88-007,Suppl 1, Power Oscillations in Bwrs. Reactor Analyst Procedure RAP 7.3.16, Plant Power Changes Revised to Provide Listed Guidance on Thermal Hydraulic Instability

Advises of Actions Taken by Util in Response to NRC Bulletin 88-007,Suppl 1, Power Oscillations in Bwrs. Reactor Analyst Procedure RAP 7.3.16, Plant Power Changes Revised to Provide Listed Guidance on Thermal Hydraulic Instability

ML20235L902
Person / Time
Site:	FitzPatrick
Issue date:	02/21/1989
From:	Fernandez W POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
IEB-88-007, IEB-88-7, JAFP-89-0141, JAFP-89-141, NUDOCS 8902280027
Download: ML20235L902 (3)

Text

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James A.FitzPatrick Nuclear Power Plant

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~.g P.O. Box 41

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Lycoming. New York 13093 315 342-3840 ewWrkPbwer ihOri Wi!Ilam Femandez ll nesident uanager -

February 21, 1989

'JAFP-89-0141 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk

~ Washington, D.C.

20555

Reference:

NRCB 88-07, Supplement 1:

Power Oscillations in Boiling Water Reactors (BWRs)

Dear Sirs:

This letter is to advise you of the actions taken by the New York Power Authority l

l in response to NRCB 88-07, Supplement I with respect to the James A. FitzPatrick Nuclear Power Plant. Docket No. 50-333.

The following procedure changes have been made in response to requested action 1 of NRCB 88-07, Supplement 1:

. Reactor Analyst Procedure (RAP) 7.3.16, Plant Power Changes has been revised to provide the following guidance concerning thermal hydraulic instability:

intentional entry into regions A, B and C of the power flow map contained in NRCB 88-07, Supplement 1 (hereafter referred to as Figure 1) is prohibited.

operators are directed to manually scram the reactor if region A of Figure 1 is entered.

operators are directed to immediately exit regions B and C of Figure 1 if they are entered unintentionally. Allowed methods of performing this are insertion of predefined sets of control rods (cram groups) and increasing flow on operating recirculation pump (s).

Starting an idle pump to exit these regions is specifically prohibited.

operators are directed to manually scram the reactor in the event core thermal hydraulic instability occurs while operating in region B or C of Figure 1.

observance of APRM peak to peak oscillations greater than 10% and periodic l

LPRM upscale or downscale alarms have been identified as indication that an l

l instability exists.

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. February 21, 1989'

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FROM:

' WILLIAM FERNANDEZ Power Oscillations in Page 2 of 3 JAFP-89-0141^

Referdnce: NRCB 88-07. Supplement 1:

Boiling Water Reactors (BWRs) 1 a manual' scram is required when there is no forced' circulation-in the RUN

, mode.

Abnormal' Operating Procedure (A0P) 8. Loss of Reactor Coolant Flow has been revised to include the following:

. a manual reactor scram is required when there is no forced-circulation while in the RUN mode.

operators are directed to manually scram the reactor if region A of Figure'l is entered.

instructions are provided concerning the methods operators are to use to -

exit regions B or C of Figure 1 if they are inadvertently entered.

~APRM oscillations of greater than 10% peak to peak and periodic LPRM. upscale M

or'downscale alarms are included in the list of indications of core thermal hydraulic stability.

As approved by the NRC.in Amendment 109 to the Operating License, FitzPatrick-operates with General Electric Fuel and 4 Westinghouse bundles which'are analytically equivalent to GE fuel bundles. Therefore in response to action 2 of.

' NRCB 88-07, Supplement 1,'the boundaries defined on Figure 1 are applicable to this' reactor.

In response to requested action 3 of NRCB 88-07, Supplement 1, procedure wording has been revised to ensure that it is clear that it is permissible to enter regionLC of Figure 1 in order to exit Region B of the same figure.

A separate Abnormal Operating Procedure to provide directions for.the Suppression of Abnormal Flux Oscillations has not been written, as was previously planned.

With the release of the General Electric " Interim Recommendations for Stability

. Actions" in November 1988, and the incorporation of these items into plant prcredures, this was no longer necessary since a manual scram is required if instability occurs.

_ _ _ _- -_-___-_ - _- _ _ _ ___ -_-_ _ - _ ____=_ - ______ _2__

a se TO:

USNRC February 21, 1989 FROM:

WILLIAM FERNANDEZ JAFP-89-0141

Reference:

NRCB 88-07, Supplement 1: Power Oscillations in Page 3 of 3 Boiling Water Reactors (BWRs)

J I

Questions regarding our response to this bulletin may be directed to Mr. David E.

Burch at (315) 349-6311.

WILLIAM FERbAh EZ RESIDENT MAbAG R Subscribed and Sworn to before me on this f

day ofsd d tu a s 1989.

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V f) hh9-d h b E M' Notary Public BONNIE S. BOSTIAN #4857051 Notary Futlic. State c1 New York Oswego County Tq My Commission Empires June 30,19115 WF:

dmh CC:

U.S. Nuclear Regulatory Commission Region 1, Attention: W.T. Russell, Regional Administrator NRC Resident Inspector WP0 for RMS Headquarters' Distribution G. Rorke R. Liseno D. Burch R. Chase Document Control Center II

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