Arizona Nuclear Power Project

P.O. BOX 52034 ~PHOENIX. ARIZONA85072-2034

Docket Nos. STN 50-528/529/530

November 5, 1987

161-00647-EEVB/JRP

U.S. Nuclear Regulatory Commission

Washington, D.C. 20555

Attn: Document Control Desk

References: (1)'ette'r from J. G. Haynes, ANPP, to U.S. NRC, dated

October 8, 1987, 161-00562-JGH/JRP.

(2) Letter from J. G. Haynes, ANPP, to U.S. NRC, dated

October 21, 1987, 161-00602-JGH/JRP.

(3) Letter from E. Van Brunt, ANPP, to U.S'. NRC, dated

October 24, 1987, 161-00609-EEVB/WFQ

(4) Letter from J. G. Haynes, ANPP, to U.S. NRC, dated

October 29, 1987, 161-00616-JGH/JRP

Dear Sirs:

Subject: Palo Verde Nuclear Generating Station (PVNGS)

Units 1, 2and 3

Reactor Coolant Pump Shafts

File: 87-A-056-026

The referenced letters discuss ANPP's plan of action for the reactor coolant

pump (RCP) shafts at PVNGS. In ameeting held with the staff on October 24,

1987, ANPP agreed to conditions of the NRC's confirmatory order modifying the

Unit 2license. This agreement was transmitted to the NRC by Reference 3.

As aresult of the meeting held in your offices on November 4, 1987,

concerning the PVNGS RCP shafts, we agree to take the following actions to

allow the continued operation of PVNGS Unit 2.

We will implement an augmented vibration monitoring program for each of the

four reactor coolant pumps that includes the following elements:

1. Every four hours, monitor and record the vibration data on each of the

four reactor coolant pumps.

2. On adaily basis, perform an evaluation of the pump vibration data

contained in 1. above by using an appropriately qualified engineering

individual.

3. When any one vibration monitor on the reactor coolant pumps indicates a

vibration level of 8mils or greater, the Nuclear Regulatory Commission

shall be notified within four hours via the Emergency Notification

System.

~BX111aa12B 8/1zo qgal

PDR ADOCK 050

PPD