Headquarters Daily Report APRIL 07, 1997 *************************************************************************** REPORT NEGATIVE NO INPUT ATTACHED INPUT RECEIVED RECEIVED HEADQUARTERS û REGION I û REGION II û REGION III û REGION IV û PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION III APRIL 7, 1997 Licensee/Facility: Notification: Consumers Power Co. MR Number: 3-97-0061 Big Rock Point 1 Date: 04/07/97 Charlevoix,Michigan RI PHONECON Dockets: 50-155 BWR/GE-1 Subject: EXTENDED OUTAGE Discussion: On April 5, 1997, the licensee announced that the current outage which began on March 2 for refurbishing backup core spray valves MO-7071 and VPI-303 (ref. Morning Report No. 3-97-0034), has been extended for up to 2 weeks. While the valves had been refurbished, additional analysis and possible hardware changes are required to reduce the risk of challenging the relief valves in the post incident system. Post incident system relief valves RV-5077, RV-5078, and RV-5082 typically actuate during operation of the diesel fire pump. Failure of these valves to reseat, once actuated, would divert flow from the core spray system which is needed during accident conditions. The licensee plans to resolve this condition prior to startup. Regional Action: Region III engineering and the senior resident inspector are following the licensee's actions. Contact: BRUCE BURGESS (630)829-9629 H. A. WALKER (630)829-9728 ` _ REGION IV MORNING REPORT PAGE 2 APRIL 7, 1997 Licensee/Facility: Notification: Houston Lighting & Power Co. MR Number: 4-97-0036 South Texas 1 Date: 04/07/97 Wadsworth,Texas Dockets: 50-498 PWR/W-4-LP Subject: UNIT 1 CONTROL ROD DROP TESTING Discussion: On April 4, 1997, the licensee shutdown Unit 1 in preparation for control rod testing. The testing, which was performed on Saturday, April 5, was required as part of the licensee's ongoing program to monitor the effect of high burnup on control rod performance. Test results were as follows: (1) a total of four control rod assemblies did not fully insert, (2) two of the control rod assemblies were located in shut down Bank B, and (3) the other two assemblies were located in control Bank A. All four control rod assemblies stuck six steps out from the fully inserted position. Using previous control rod drop testing results and fuel exposure data, the licensee predicted that these four rods may not fully insert. Upon completion of the control rod drop testing, having no unexpected results, the licensee commenced a reactor startup and returned the unit to 100 percent power. The licensee is continuing to evaluate the resulting data obtained during the control rod drop testing. The resident inspectors observed the control rod drop testing, and Headquarters has reviewed the priliminary results of the testing. Regional Action: For information purposes only. Contact: Joseph Tapia (817)860-8243 Ronald A. Kopriva (817)860-8104 _