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Category:REPORTABLE OCCURRENCE REPORT (SEE ALSO AO LER)
MONTHYEARML20079D5911991-07-0909 July 1991
Ro:On 910703,SRO Noticed Uncontrolled or Unanticipated Change in Reactivity During Operation to Calibr Shim Control Rod on Reactor.Caused by Overheating of Aged Resistor.On 910708,resistor Was Replaced
ML20140F9121985-06-19019 June 1985
Ro:During 841108-850620,reactor Operations Committee Failed to Meet.On 850528,P Rogers Discovered to Have Operated Reactor Beyond Expire Date of License.Corrective Actions Include Scheduling Meetings & Posting Certificates
ML20072C7221983-06-16016 June 1983
Ro:On 830602,fast Transient Control Rod Failed to Return Completely to Core Following Manual Scram.Caused by Air Cylinder Being Dry.Light Oil Added to Cylinder.Maint Checklists Under Review for Possible Rev
ML20063D7471982-07-0606 July 1982
Ro:On 820702,nuclear Reactor Inadvertently Operated for Period of 1-h & 11 Minutes at Calorimetrically Established Power Level of 327 Kv.Caused by Removal of Specimen Rack Decreasing Flux Level More than Anticipated
1991-07-09
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Category:TEXT-SAFETY REPORT
MONTHYEARML20217B5651999-06-30030 June 1999
Univ of CA Irvine Nuclear Reactor Facility Annual Rept for 980701 to 990630. with
ML20202A7441999-01-22022 January 1999
Safety Evaluation Supporting Amend 4 to License R-116
ML20153F1361998-06-30030 June 1998
UC Irvine Nuclear Reactor Facility Annual Rept for 970701- 980630. with
ML20199L6631997-06-30030 June 1997
UC Irvine Nuclear Reactor Facility Annual Rept for 960701-970630
ML20115J0521996-06-30030 June 1996
Annual Rept for Jul 1995-June 1996
ML20091L3791995-06-30030 June 1995
Univ of CA Nuclear Reactor Facility Annual Rept for Jul 1994 - June 1995
ML20046C3671993-06-30030 June 1993
Univ of California Irvine Nuclear Reactor Facility Annual Rept for Jul 1992-June 1993. W/930730 Ltr
ML20099G4661992-06-30030 June 1992
Univ of California Irvine Nuclear Reactor Facility Annual Rept for Jul 1991 to June 1992
ML20079D5911991-07-0909 July 1991
Ro:On 910703,SRO Noticed Uncontrolled or Unanticipated Change in Reactivity During Operation to Calibr Shim Control Rod on Reactor.Caused by Overheating of Aged Resistor.On 910708,resistor Was Replaced
ML20077J8981991-06-30030 June 1991
Annual Rept for Uci Nuclear Reactor Facility for Jul 1990 - June 1991
ML20058L5961990-06-30030 June 1990
Univ of California Irvine Nuclear Reactor Facility Annual Rept for Jul 1989 to June 1990
ML20011D7731989-12-18018 December 1989
Ro:Transient Control Rod Stuck Towards Upper End of Travel During Routine start-up Checks.Complete Rod Assembly Removed for Insp Showed Plastic Piston Deteriorated.New Piston Installed,Tested & Returned to Svc
ML20246N3111989-06-30030 June 1989
Annual Rept for Jul 1988 - June 1989
ML20207J0821988-06-30030 June 1988
Annual Rept for Jul 1987 - Jun 1988
ML20237G9541987-06-30030 June 1987
Univ of California,Irvine,Nuclear Reactor Facility Annual Rept for Jul 1986 - June 1987
ML20214Q2701986-09-18018 September 1986
Part 21 Rept Re Defective Interlock in Control Rods During Movement to Full Up Position.Initially Reported on 860915. Corrective Action Will Be Taken by Univ of Illinois & Univ of California at Irvine
ML20215P0011986-06-30030 June 1986
Annual Rept for Jul 1985 - June 1986
ML20134G4931985-06-30030 June 1985
Annual Rept for Jul 1984 - June 1985
ML20140F9121985-06-19019 June 1985
Ro:During 841108-850620,reactor Operations Committee Failed to Meet.On 850528,P Rogers Discovered to Have Operated Reactor Beyond Expire Date of License.Corrective Actions Include Scheduling Meetings & Posting Certificates
ML20101B2881984-06-30030 June 1984
Annual Rept for 830626-840630
ML20024C9631983-07-0808 July 1983
Ro:On 830701,during Withdrawal of Adjustable Transient Rod Cylinder,Control Rod Began to Withdraw.Probably Caused by Dirt in Air Sys Due to Clogged Permanent Filter.Regular Maint of Filter Planned
ML20072K0081983-06-27027 June 1983
Annual Operating Rept for 820701-830625
ML20024A9111983-06-25025 June 1983
Ro:On 830624,fast Transient Rod Failed to Insert When Scrammed.Caused by Dryness of air-cylinder Portion of Rod Drive.Sys Completely Cleaned W/Solvent & Seals Inspected
ML20072C7221983-06-16016 June 1983
Ro:On 830602,fast Transient Control Rod Failed to Return Completely to Core Following Manual Scram.Caused by Air Cylinder Being Dry.Light Oil Added to Cylinder.Maint Checklists Under Review for Possible Rev
ML20063D7471982-07-0606 July 1982
Ro:On 820702,nuclear Reactor Inadvertently Operated for Period of 1-h & 11 Minutes at Calorimetrically Established Power Level of 327 Kv.Caused by Removal of Specimen Rack Decreasing Flux Level More than Anticipated
ML20062D7991982-06-30030 June 1982
Annual Rept for Jul 1981-June 1982,License:R-116
ML20009G3611981-07-29029 July 1981
Annual Rept for Period Jul 1980 - June 1981.
ML19320C0011980-07-0808 July 1980
Annual Rept for Period 790701-800630.
ML19248D2121979-08-0606 August 1979
Annual Operating Rept for Jul 1978-June 1979
ML19276F1381978-06-30030 June 1978
Annual Rept for Jul 1977-June 1978
1999-06-30
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Text
UNIVERS!TY OF CALIFORNIA, IRVINE NR AILf Y
- Rn lRMlJf . SAN 1111 0 0 MN IR ANtND SANTA iMRMRA . SANTA CRL7 DEPARTh!ENT OF CIIEMISTRY lRVINE. CALIF ORNI A w !?
June 16th, 1983 U.S. Nuclear Regulatory Commission, Chief, Standardization and Special Projects Branch, Division of Licensing, Washington D.C. 20555 Re: Docket 50-326, License R-116 Incident Report for June 2nd,1983 Reported under Tech. Specs:
3 6.7.c.3.
s (abnomal occurrence)
Gentlemen, i
On June 2nd,1983 the fast transient control rod (FTR) failed to return completely to core following a manual scram. The scram nas at the end of a core excess check operation, following maintenance activities involving the air supplies to the transient rods ( cleaning of air filter trap ). This activity had involved successive " firing" of the FTR several times, to remove air pressure from the system. Operations were suspended until the Reactor Supervisor was able to inspect the system on the following day.
Inspection of the rod drive system revealed that the interior of the air cylinder was somewhat dry. A few drops of light oil were added and the rod drive fired several times. Successful reinsertion into core was obtained. As a final check, rod drop times were carefully determined and found to be in complete agreement with values obtained on prior occasions during 6-month tests.
Inspection of maintenance records indicated no reference to the annual maintenance
< of " placing a few drops of light oil into the air cylinder for the FTR " during the previous annual maintenance cycle completed in January,1983. As a result of personnel changes in 1982, this item was overlooked, and had not been placed as as an individual item on any check list. The check list had a general entry for FTR drive maintenince.
As a result of this occurrence, officially classified as an " abnormal occurrence" according to Tech Specs 1.13 for this facility, we are undertaking a complete review of our maintenance checklists, and are revising them. In addition, any items found to have been overlooked, or for which no clear record is apparent, will be repeated now to get them back in order, and will be performed again in the January cycle. This activity, because of summer vacations, etc, and the need for fairly extensive revision of checklists, and some procedural documents, jeg is expected to take until mid-September for completion.
- a. It must be emphasized that this incident in itself did not have any significant h
uno safety aspects. The FTR is only worth approximately $0.65 reactivity because of its core location. Its function is therefore not essential to assuring the safe shut-down' of the UCI reactor, since a wide margin over available excess
$t reactivity is provided by the other control rods.
Sincerely yours, [pA P fg cc:- NRC Region V W.Lillyman, Tlie,Vice Chancellor .b Q /8 J
,I O cocan nn, ir, ROC George E. Miller, Reactor Supervisor P. Rogers, SR0