ML20217B384
| ML20217B384 | |
| Person / Time | |
|---|---|
| Site: | |
| Issue date: | 10/04/1999 |
| From: | Sears C PENNSYLVANIA STATE UNIV., UNIVERSITY PARK, PA |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9910120228 | |
| Download: ML20217B384 (1) | |
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PENNSTATE Radiation Science and Engineering Center - (814) 865-6351 College of Engineering The Pennsylvania State University Breareale Nuclear Reactor Building October 4,1999 University Park. PA 16802-2301 U. S.Nudcar Regulatory Commission Document Catrol Desk Washington, DC 20555 Re: - Reportable Ocorence: Violation of Tecimical Specification 3.2.6 license No. R-2, Dsdet No.50-005 Dear Sir or Madame This letter confirms my telephone calls of today, October 4,1999, to Tom Dragoun of Region I and Al Adams of IIDQ regarding a arportabic occurrence at the Penn State Breazcale Reactor. Technical Specification (TS) 3.2.6, SCRAhi Time, specifies: "The time from SCRAM initiation to the full insertion of any control rod from a full up position shall be less than I second."
On Friday, October 1,1999, with the reactor shutdown, testing was being conducted to measure the drop time for the Transient Rod (TR). During the testing the TR failed to freely drop into the core. TS 3.13, Shutdown Margin, and TS 3.2.1, Reactor Control Rods, were not impacted by this occurrence.
A related occurrence took place on September 29,1997 and was reported in correspondence dated October 3,199'7 and October B, 1997.
There was no indication of unacceptable performance of the TR prior to this test. Routine testing of the TR had been conducted on Monday, September 27,1999 with . fully acceptable results. Following that testing a cleaning of the TR was conducted and drop times of just over 600 milliseconds were rucasured. The testing on Friday was conducted as part of an effort to assess the long-term effects of the cleaning. Additional testing was to be conducted on Monday, October 4,1999, as part of that assessment. Routine morning checkouts during the week, including that Friday morning, had not indicated any problems with the movement of the TR. No problems with the TR were observed during that week's operations.
'Ibc reactor is shutdown while we investigate, determine, and correct the cause of this event. A 14-day writ?cn report, as required by l TS 6.6.2 will be sutanitted.
. Sincerely,-
G.A %at 1 1 0 C. Frederick Sears Director,RSEC i pc: A. Adams,NRC,IIDQ T. Dragonn, NRC, Region 1 M. Mendonca, NRC,IIDQ vaD' W. Witzig, Chair, PSRSC 9910120228 991004 PDR ADOCK 05000005 0 PDR- ,f8 tonege or t:ngmeermg An Equal Opportunity University