ML19317F937
| ML19317F937 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 07/28/1977 |
| From: | Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| To: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| Shared Package | |
| ML19317F919 | List: |
| References | |
| NUDOCS 8002210649 | |
| Download: ML19317F937 (3) | |
Text
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s S~ U 2 SACRAMENTO MUNICIPAL UTILITY DISTRICT C 6201 S Street, Box 15830. Sacramento California 95813: (916) 452 3211 July 28, 1977 O
Nuclear Regulatory Commission 10 ATIN:
Mr. R. H. Engelken
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Director of Regulatory Operations NRC Operations Office, Region V 1990 N.' California Boulevard
$L g,hogg Walnut Creek Plaza, Suite 202 Walnut Creek, California 94596 p.-
Re:
IE Inspection Report No. 50-312/77-08
Dear Sir:
The inspection conducted by Mr. F. Wenslawski of your office on June 13-16 and 24, 1977, was summarized in a notification letter received by the District July 11, 1977. The letter in Appendix A indicates two infractions which were observed by your inspector.
This letter outlines the response and corrective actions to preclude repeating of these infractions.
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" Appendix B, Technical Specification 4.10, requires the installation of TLD badges at specified locations in the environs of the facility to measure integrated radiation levels. Badges are to be changed at quarterly intervals.
Contrary to this requirement to measure radiation levels in the environs of the facility, your processing of the TLD badges for the first quarter of 1977 was performed with a defective instrument resulting in invalid environ-mental radiation exposure data for that quarter."
SMUD Reply When the TLD chips were measured for the first quarter of 1977, all five chips from each monitoring site were processed. To prevent loss of future readings should a failure of the equipment occur, only four of the five chips from each monitoring site will be processsd Should a determination of a failure occur, the equipment will be repaired, calibrated and the fif th (standby) chip will be processed to obtain the environmental radiation exposures. A procedure has been written to properly calibrate and document the TLD reader calibration.
Included in the procedure are requirements that if the instru-mentation technician observes any significant deviation of the response characteristics during the calibration procedure, he will notify the Radiation Control personnel prior to their use of the equipment. Applicable procedures
' are also being reviewed to. assure conformance to NRC Guide 4.13, " Performance Testing and Procedural Specifications for TLD's; Environmental Applications".
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Mr. R. H.-Engelken. July 28, 1977 l
The completion, review and approvals of this procedure should be ready prior to the next quarterly environmental monitoring TLD readings. A training session of the Radiation Control personnel who use this equipment is being prepared. The session will stress the importance of recognizing aberrant readings of the environmental data. Should such readings be detected, a supervisor will be notified for appropriate action.
The above corrections should prevent recurrence of this infraction.
" Appendix A, Technical Specification 6.11, requires that procedures for personnel radiation protection shall be prepared consistent with the requirements of 10 CFR 20 and shall be approved, maintained and adhered to for all operations involving personnel radiation exposure.
Rancho Seco Procedure AP-500, " Emergency Plan",Section III.E, " Radiation Evacuation Procedures", states that "a single unannounced constant air monitor radiation alarm" will be cause for an in-plant local area evacuation to be initiated.
This procedure also states that "in cases where the alarm is associated with an air monitor, appropriate respiratory protection will' be worn when initial re-entry and alarm verification is made".
. Contrary to this requirement, on April 14, 1977, an evacuation of the waste
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gas compression room area of the Auxiliary Building was not initiated until 44 l
minutes after the VSG airborne activity monitor reached an alarm point for the waste gas compressor -room.
In addition, initial verification entries into the j
high airborne radioactivity area wara made by an auxiliary operator and a
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chemical / radiation assistant without wearing respiratory protection."
i SMUD Reply Retraining is being planned to include reinforcement of responses to hazards of entering areas of known airborne radioactivity. Simultaneously a
-respiratory training program has been initiated for the physical work force at Rancho Seco.- The force includes operators, maintenance and repair personnel, i
and contractors who may have use of the respiratory equipment. As of this'date 1
(July 25, 1977) seventy-(70) personnel.have completed this program and sessions are planned to train approximately one hundred (100) additional personnel.
l This training should be complete prior to the unit shutdown for Core II refueling scheduled.for, August 19, 1977.
i Operator. training for swift evaluation-of airborne activity is being enhanced to permit evaluation of significant activity levels during the 'ackshifts i
and weekends.
(Day shifts are covered by Radiation Contro* personnel.'
The
. training vill include use of the Hi-Vol particulate. sampling devices and methods for assessing the activity collected.- Grab sampling devices for de.ection of significant levels of radioactive gases have been procured.
Procedures for their use and evaluation of activities are being written and will be completed f
l by August 31,'1977.. lSpecific training -in the use o,f the equipment will follow af ter approval of the procedures.
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D Mr. R. H. Engelken July 28, 1977 i
A program has been started that will establish background airborne activity levels and detect abnormal levels prior to reaching the Vtntilation
~ System Gas Radiation Monitor setpoints. These surveys of the Auxiliary Building will be performed twice per week.
The above actions will instruct personnel in the use of respiratory devices and the necessity of following established procedures and will allow rapid determination of airborne activities.
Respectfully submitted, t-J.
. Mattimoe Assistant General Manager and Chief Engineer a
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