ML032671084

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Correction to the Ostr July 1, 2001 - June 30, 2002 Annual Report
ML032671084
Person / Time
Site: Oregon State University
Issue date: 09/11/2003
From: Klein A
Oregon State University
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML032671084 (4)


Text

OREGON STATE UNIVERSITY 10 Radiation Center, CoValis, Oregon 97331-59D3 Telophone 541-737.2341 Fax 541-737-0480 September 11, 2003 U. S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555

Reference:

Oregon State University TRIGA Reactor (OSTR)

Docket No. 50-243, License No. R-106 OSTR 2001-2002 Annual Report

Subject:

Correction to the OSTR July 1, 2001- June 30,2002 Annual Report The purpose of this letter is to inform the Commission of an error in the OSTR July 1, 2001 - June 30, 2002 Annual Report. On September 8, 2003 it was brought to our attention that Table IV.C. 1, UnplannedReactor Shutdowns and Scrams, was in fact a duplicate (i.e., not updated) of the same table found in the OSTR July 1, 2000 - June 30, 2001 Annual Report Please replace it with the attached correct table.

If there are any questions regarding the information submitted, please let me know.

I declare under penalty of peijury that the foregoing is true and correct. Executed on: Z f/~'4 Sincerely Andrew C. Klein Director Attachment cc: Al Adams, USNRC (w/ enclosure)

Craig Bassett, USNRC (w/ enclosure)

David Stewart-Smith, OOE (w/ enclosure)

Rich Holdren, OS (w/ enclosure)

John Ringle, OSU (w/ enclosure)

Steve Reese, OSU (w/ enclosure)

Gary Wachs, OSU (wl enclosure) r2\O~

Table IV.C.1 Unplanned Reactor Shutdowns and Scrams Type of Event Numbero Cause of Event Occurrences Equipment Gaseous scaler count rate Manual SD I indicating 2-3 times normal rate. Amplifier scale switch problems blamed for bad readings.

Equipment. HV1 scram received during HVI Scram 3 operation at 1 MW. No apparent cause, Fission chamber log recorder verified no transient actually occurred.

Operator Error. Rapid transient rod Safety Power Scram I withdrawal following square wave power stabilization at 1 MW.

Equipment. Evidence of Cooling Tower Manual Scram I low basin level (secondary pump cavitations) due to stuck closed makeup valve.

Period Scram 2 Equipment Instrument noise on startup.

Operator Error. Inbalance of power channel detectors followed by reactor tank Safety Channel Scram 3 temperature rise. Lack of proper power level control while increasing power to 1 MW.

Safe, Power and HVI Operator Error. Improper use of rod curves Scram I to determine transient rod height used to set square wave reactivity addition.

Operator Error. Improper square wave Period Scram 1 switch sequence operation during square wave to I MW.

Reactor IV- 17

RADATION CENTER OREGON STATE UNIVERSITY 100 kadiaho Center, Caval. Oregon 97331-5903 Tlphone 541-737-2341 Fax 541-737-0480 September 11, 2003 U. S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555

Reference:

Oregon State University TRIGA Reactor (OSTR)

DocketNo. 50-243, License No. R-106 OSTR 2001-2002 Annual Report

Subject:

Correction to the OSIR July 1, 2001- June 30,2002 Annual Report The purpose of this letter is to inform the Commission of an error in the OSTR July 1, 2001 - June 30,2002 Annual Report On September 8,2003 it was brought to our attention that Table 1V.C.1, UnplannedReactorShbutdowns andScrams, was in fact a duplicate (i.e., not updated) of the same table found in the OSTR July 1, 2000 - June 30, 2001 Annual Report. Please replace it with the attached correct table.

If there are any questions regarding the information submitted, please let me know.

I declare under penalty of peury that the foregoing is true and correct. Executed on:______

Sincerely Andrew C. Klein Director Attachment cc: Al Adams, USNRC (w/ enclosure)

Craig Bassett, USNRC (wi enclosure)

David Stewart-Smith, OOE (w/ enclosure)

Rich Holdren, OSU (w/- enclosure)

John Ringle, OSU (w/ enclosure)

Steve Reese, OSU (wf enclosure)

Gary Wachs, OSU (w/ enclosure)

Table IV.C.1 Unplanned Reactor Shutdowns and Scrams Type of Event Number Cause Cueoof Event

_________________Occurrences vn Equipment Gaseous scaler count rate Manual SD I indicating 2-3 times normal rate. Amplifier scale switch problems blamed for bad readings.

Equipment. HVI scram reived during operation at I MW. No apparent cause, HV1 Scram 3 Fission chamber log recorder verified no

__ ._._._ _ _ _ trnsen actualy or1.

Operator Eor. Rapid ttanient rod Safety Power Scram I withdrawal following square wave power

'I

, _______ stabilization at 1 MW.

Equipment. Evidence of Cooling Tower Manual Scram I low basin level (secondary pump cavitations) due to stuck closed makeup valve.

Period Scram 2 Equipment Instniment noise on startup.

Operator Error. Imbalance of power channel detectors followed by reactor tank Safety Channel Scram 3 temperature rise. Lack of proper power level control while increasing power to 1 MW.

Error. Improper rod use of rod Safe, Power SawradH11 and HVI Operator to determine transient height usedcurves to set Scram square wave reactivity addition.

Operator Error. Improper square wave Period Scram 1 switch sequence operation during square

____wave to I MW.

Reactor IV- 17