ML20154Q891

Forwards Response to Items Identified in IE Bulletin 85-001, Steam Binding of Auxiliary Feedwater Pumps. Procedures 410P-1AF02 & 420-2AF02 Revised to Include Fluid Temp Monitoring

ML20154Q891
Person / Time
Site:	Palo Verde
Issue date:	02/28/1986
From:	Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
ANPP-35355-EEVB, IEB-85-001, IEB-85-1, NUDOCS 8603240163
Download: ML20154Q891 (3)

Text

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Arizona Nuclear Power Project P.o. box 52034 e PHOENIX. AR: ZONA 85072-2034 Q*

$9 ,

February 28, 1986 O. 2n ANPP-35355-EEVB/JBK/98.0i5 o s S-

% 9 U.S. Nuclear Regulatory Commission o)

Region V 1450 Maria Lane, Suite 210 Walnut Creek, CA 94596-5368 Attention: Mr. J. B. Martin Regional Administrator, Region V

Subject:

NRC IE Bulletin 85-01: Steam Binding of Auxiliary Feedwater Pumps File: 86-055-026

Dear Mr. Martin:

This letter refers to the request for action and information, as identified in the subject bulletin, that was received by ANPP on November 14, 1985. Attached please find the responses to those items directed to licensees and plants under construction.

Very truly yours,

{

LC -

m nLW E. E. Van Brunt, Jr.

Executive Vice President Project Director EEVB/JBK/rw Attachment cc: R. P. Zimmerman (all w/a)

E. A. Licitra .

A. C. Gehr U.S. Nuclear Regulatory Commission (original)

Document Control Desk Washington, D.C. 20555 8603240163 860220 PDR ADOCK 05000529-G PDR 3

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Attachment

-to ANPP-35355 e

Attachment NRC Action Item

1. Develop procedures for monitoring fluid conditions within the AFW system .

on a regular basis during times when the system is required to:be oper-able. This monitoring should ensure that fluid temperature at the AFW pump discharge is maintained at about ambient temperature. Monitoring of fluid conditions, if used as the primary basis for precluding steam; binding, is recommended each shift.

This item is not intended to require elaborate' instrumentation. A simple ~

means of monitoring temperature, such as touching the pipe,' is a satis-factory approach.

PVNGS Response Procedures 410P-1AF02 (1-31-86), 420P-2AF02-(2-7-86), and-430P-3AF02 (2-7-86) are revised to include fluid temperature monitoring (using temperature plate recording tape) at least once per shift at the nonsafety-related - AFW . pump

! discharge in all three units. The fluid temperatures at ,the other ,two AFW -

pumps are not monitored because they are not -susceptible. to steam binding from backleakage. The temperature reading is recorded on the operator's' log -

j sheet at least once per shift.

Because of the non-complex modifications and explicit procedural _ changes,=

in addition to training covered through watch station qual _ifications and the log sheet readings for the area involved, the . incorporation of the proce-4 dures into the Nuclear Operator Training Pregram.is.~ unnecessary.

4-NRC Action Item

2. Develop procedures for recognizing steam binding and for restoring _the-AFW system to operable status, should steam binding occur.

PVNGS Response Procedures 410P-1AF02,- 420P-2AF02, and 430P-3AF05 are re~ v ised - to include the identification of steam binding from increasing pi.pe itemperature due to possible backleakage.

Operations Department Guideline =15 ~1s_ revised to ensure the. operator monitors -

fluid conditions each shift and reports any. temperature increases 'to the'-

control room. Moreover..- the. _ shift supervisor 1st- responsible for reviewing.-

the log sheet for abnormal temperature readings. If an abnormalitemperature change is present, the shift supervisore will . initiate an investigation to identify' the root /cause of the temperature increase. If 'it nis Jdetermined' the pump is steam bound, lthe pump:will be isolated and; operability restored-as dictated by Technical ' ' Specifications:(3/4 7-4). :

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Attachment tg ANPP-35355 Attachment (page 2) s NRC Action Item

3. Procedural controls should remain in effect until completion of hardware modifi-cation to substantially reduce the likelihood of steam binding or until super-seded by action implemented as a result of resolution of Generic Issue 93.

PVNGS Response The procedural controls aforementioned shall remain effective until completion of hardware modification to substantially reduce the likelihood of steam binding in the nonsafety-related AFW pumps. Moreover, a' procedural change requires a 50.59 review j to ensure the AFW system protection against steam binding is not degraded.

NRC Item -

Although no specific request or requirement is intended. the following information '

would be helpful to the NRC in evaluating the cost of this bulletin: '

1. Staff time to perform requested review and testing.

2. Staff time to prepare requested documentation..

PVNGS Response The estimated time to complete the aforementioned tasks are summarized below.

1. Staff time to perform:

Reviews - 60 Man-hours Testing - 2 Man-hours / week

2. Staff time to prepare requested documentation was-32 Man-hours.

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