ML20149M673
| ML20149M673 | |
| Person / Time | |
|---|---|
| Site: | 05000083 |
| Issue date: | 01/15/1997 |
| From: | Vernetson W FLORIDA, UNIV. OF, GAINESVILLE, FL |
| To: | Reyes L NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 9701240250 | |
| Download: ML20149M673 (2) | |
Text
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UNIVERSITY OF Dc' FLORIDA i
Nuclear Reactor Facility 202 Nuclear Sciences Center Department of Nuclear and Radiological Engineering P.o. Box 118300 Gainesville, Florida 32611-8300 Tel: (352) 392-1429 Fax: (352) 392-3380 E-mail: vernet @ server.nuceng.ur..edo January 15,1997 Attn: Luis Reyes, Regional Administrator Potential Tech Spec Violation -
U.S. Nuclear Regulatory Commission Improper Stack Monitor Calibration Region II 101 Marietta Street NW, Suite 2900 Atlanta GA 30323 Re: University of Florida Training Reactor / Facility License R-56, Docket No. 50-83 As per a telephone conversation on January 14,1997 with Mr. Ed McAlpine concerning an i
improperly calibrated stack radiation monitor, we have concluded that this failure to properly calibrate the stack radation monitor is a potentially reportable occurrence per UFTR Technical Specifications Section 6.62 delineating requirements for special reports.
The UFTR Technical Specifications require calibration checks of the stack radiation monitor on a quarterly basis. Although always performed in a timely manner, the use of a flawed procedure that failed to correct for the decay of the Cs-137 calibration source since mid-1990 led to a 1
monitoring system that was not properly calibrated. The applicable section of the UFTR Technical Specifications requiring the quarterly calibration is Section 4.2.4(1) with the requirement for the monitor being in Table 3.3 in Section 3.4.2 of the Technical Specifications.
jO A full-power reactor run on January 14 authorized by the Reactor Safety Review Subcommittee l
showed the recent stack monitor indications were conservative as only minor adjustments were needed in the calibration performed on January 13,1997 and the approximate full-power steady-j
/g i l/JW state stack monitor reading is now ~2200-2300 cps versus ~2700-2800 cps on previous recent j
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Equal opportunity /Affinnative Action Institution
USNRC RegionII Page 2 January 15,1997 4
full-power steady-state operations. The fact that recent values were conservative was conveyed to Mr. McAlpine in a following conversation on January 15,1997 along with iterating that all stack grab samples to measure Argon-41 levels have been normal over this entire period. As of the afternoon ofJanuary 13,1997 this monitor is properly calibrated.
j If further information is needed, please let me know.
Sincerely, i
x Wilham G. Vernetson Director ofNuclear Facilities WGV/dms 1
Copies:
D. Cronin RSRS Sworn and subscribed this \\C30 day ofJanuary,1997.
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