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Category:REPORTABLE OCCURRENCE REPORT (SEE ALSO AO LER)
MONTHYEARML20094E3301992-01-23023 January 1992
Ro:On 920109,determined That One of Two Level Safety Sys Was Malfunctioning Due to Failure of LM339 Comparator Chip.Chip Replaced & Monitoring Circuit Tested Satisfactorily on 920110
ML20236A8061989-03-0707 March 1989
Ro:On 890224,exhaust Fan Not Operating When Reactor Critical at 10W.Caused by Switch Snagged by Belt Loop as Individual Left Control Room.Reactor Scrammed & Fan Switch Returned to on Position
ML20209F2761986-09-0808 September 1986
Ro:On 860903,during Std Shutdown of Reactor,Automatic Scram That Normally Occurs When Count Rate of Startup Channel Below 2 Cps Failed to Occur.Caused by Shorting of Input Signal.Startup Channel Repaired
ML20076K8271983-08-24024 August 1983
Ro:During Reactor Operator Training Session,Air Monitor Near Bldg Exhaust Fan Briefly Did Not Monitor Reactor Room Effluent.Monitor Used in Sniffer Mode for Evaluating 150 Ar-41 Production.Monitor Will Be Run Normally in Future
1992-01-23
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Category:TEXT-SAFETY REPORT
MONTHYEARML20212E7211999-06-30030 June 1999
Ohio State Univ Research Reactor Annual Rept for FY98/99. with
ML20153E0961998-09-30030 September 1998
Oh State Univ Research Reactor Annual Rept for Fy 97/98. with
ML20211B1661997-06-30030 June 1997
Oh State Univ Research Reactor Annual Rept for FY96/97
ML20136D6921997-03-0606 March 1997
Safety Evaluation Supporting Amend 17 to License R-75
ML20129D9601996-06-30030 June 1996
Oh State Univ Research Reactor Annual Rept for FY95/96
ML20092M8301995-06-30030 June 1995
Oh State University Research Reactor Annual Rept for FY94/95
ML20086A3611995-05-10010 May 1995
Trtr Peer Review for Oh State Univ Nuclear Reactor Lab, for 950214-15
ML20073G4251994-06-30030 June 1994
Oh State Univ Research Reactor Annual Rept for FY93/94. W/
ML20056F7721993-08-23023 August 1993
Safety Evaluation Supporting Amend 14 to License R-75
ML20118A7251992-06-30030 June 1992
Annual Rept for Ohio State Univ Research Reactor for 910701 Through 920630
ML20094E3301992-01-23023 January 1992
Ro:On 920109,determined That One of Two Level Safety Sys Was Malfunctioning Due to Failure of LM339 Comparator Chip.Chip Replaced & Monitoring Circuit Tested Satisfactorily on 920110
ML20083D8841991-09-26026 September 1991
Annual Rept for Ohio State Univ Research Reactor,Jul 1990 to June 1991
ML20062F0771990-11-14014 November 1990
Safety Evaluation Supporting Amend 13 to License R-75
ML20065K7541990-11-0101 November 1990
Rev 5 to Adminstriative Procedure AP-09, Reactor Operator/ Senior Reactor Operator Requalification
ML20059N1751990-06-30030 June 1990
Annual Rept for License R-75 for Jul 1989 - June 1990
ML20247J9691989-03-0707 March 1989
QA Program for Ohio State Univ Nuclear Reactor Lab
ML20236A8061989-03-0707 March 1989
Ro:On 890224,exhaust Fan Not Operating When Reactor Critical at 10W.Caused by Switch Snagged by Belt Loop as Individual Left Control Room.Reactor Scrammed & Fan Switch Returned to on Position
ML20155A7251988-09-27027 September 1988
Safety Evaluation Supporting Order Converting License R-75 from High to Low Enriched U
ML20215F9861986-12-16016 December 1986
Rev 3 to Administrative Procedure AP-07, Review of Procedures
ML20215F9731986-12-15015 December 1986
Rev 3 to Administrative Procedure AP-09, Reactor Operator/ Senior Reactor Operator Requalification
ML20211G9641986-10-27027 October 1986
Rev 2 to Administrative Procedure AP-09, Reactor Operator/ Senior Reactor Operator Requalification
ML20209F2761986-09-0808 September 1986
Ro:On 860903,during Std Shutdown of Reactor,Automatic Scram That Normally Occurs When Count Rate of Startup Channel Below 2 Cps Failed to Occur.Caused by Shorting of Input Signal.Startup Channel Repaired
ML20206M4091986-06-16016 June 1986
Safety Evaluation Supporting Amend 11 to License R-75
ML20076K8271983-08-24024 August 1983
Ro:During Reactor Operator Training Session,Air Monitor Near Bldg Exhaust Fan Briefly Did Not Monitor Reactor Room Effluent.Monitor Used in Sniffer Mode for Evaluating 150 Ar-41 Production.Monitor Will Be Run Normally in Future
1999-06-30
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Engineering Experiment Station 142 Hitchcock Hall 2070 Neil Avente Columbus, OH 43210-1275
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Phone 614-292-2411
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UNIVERSITY March 7, 1989 l
I Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington DC 20555
Subject:
Technical Specification Violation at The Ohio State University Research Reactor Docket No. 50-150, License R-75, Resulting in a Reportable Occurrence to the NRC
Dear Sir:
Technical Specification 3.5(1) concerning the Reactor Building ventilation system states that an exhaust fan with a capacity of at least 1000 cfm shall be on whenever the reactor is operating. This'is one of several limiting conditions for operation listed in section 3.0 of the Technical Specifications. Contrary to this, at about 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br /> on February 24, 1989 the exhaust fan was not operating when the reactor was critical at 10W. Operating in violation of a limiting condition is a reportable occurrence and requires the following:
- 1. Reports to NRC
- a. Telephone or telegraph to NRC Region III ASAP and no later than the next working day (this was completed at 1540 on February 24, 1989 by telephone communication to Donald E.
Miller).
- b. Written report to NRo in Washington with a copy to Region III within 14 days (this etter represents the written report).
- 2. Actions
- a. Reactor conditions shall be returned to normal, or the reactor shut down, to correct the occurrence (the Reactor was shut down by a manual scram as soon as the operator was made aware of the situation at about 1304).
- b. The Director of the Nuclear Reactor Laboratory (NRL) shall be notified ASAP and corrective action shall be taken before resuming the operation involved (Don W. Miller was notified at about 1400 on February 24, 1989 and the switch controlling the fan was returned to the "on" position).
8903200176 890307 *h l DR ADOCK 0300 O College of Engineering
La Director, ONRR March 7,.1989
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- c. A written report to the Director of the NRL and the Reactor Operations Committee (ROC) for review and approval including:
- 1. Cause: Apparently the switch was snagged by a belt loop as an individual left the control room at about 1300. __
This was noted by an SRO in Room 104 who heard a relay outside his office trip. He brought this to the attention of another SR0 who realized the vent fan was turned off. This information was given to the console operator who immediately scrammed the reactor at 1304,
- 2. Corrective action: The reactor was scrammed and the fan switch was returned to the "on" position.
- 3. Actions to preclude or reduce the probability of recurrence: A guard shall be attached over the switch to prevent or reduce the probability of this occurring again. It shall be installed on or before March 6, 1989.
The required written report was submitted to Don W. Miller, Director of the NRL, on February 27, 1989. It was reviewed and approved by the Reactor Operations Committee at a meeting held on March 2, 1989. We believe these actions meet the requirements of the OSURR Technical Specifications and that the reacto'r can continue to be operated in a safe manner. Please contact Mr. Richard Myser (614/292-6755) if you have specific questions on this incident.
Sincerely, Robert F. Redmond Director RFR/s c: Don W. Miller, Director, NRL Richard D. Myser, Associate Director, NRL Donald E. Miller, USNRC Region III l
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