ML19317G030
| ML19317G030 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 01/03/1977 |
| From: | Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| To: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| Shared Package | |
| ML19317G025 | List: |
| References | |
| NUDOCS 8002210733 | |
| Download: ML19317G030 (3) | |
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' Ili ILI SACRAMENTO MUNICIPAL UTILITY DISTRICT O 6201 S Street Box 15830. Sacramento Cahfornia 95813; (916) 452 3211 January 3,1977 llh Mr. R. H. Engelken f_
Director of Regulatory Operations NRC Operations Office, Region V 1990 N. California Boulevard Walnut Creek Plaza, Suite 202 Walnut Creek, California 94596 Re: NRC Inicection Results of November 8-10, 15-18 and December 1-2, 1976 Inspection Dea r S i r:.
In reply to your inspection conducted by Mr. F. Wenslawski j
conducted November 8-10, 15-18 and December 1-2, 1976, we offer the following explanations and corrective actions which will assure full compliance with NRC requirements.
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Appendix A of your letter states:
A.
Contrary to Appendix B, Technical Specification 5.5.1, detailed written procedures did not exist at the time of the inspection for the following items:
1.
Describing the methods of collecting samples required by Table 2.6-2 of Appendix B.
2.
Describing the method of assuring that the maximum activity to be contained in one waste gas storage tank does not exceed 135,000 curies as required by Appendix B specifica-tion 2.6.3.E.
3 Providing an instrument description and calibration chart for the gland steam condenser monitor (Rl5021).
B.
Contrary to Appendix B Technical Specification 5.5 3, the following unreviewed and unapproved procedural items existed at the time of the inspection:
1.
The working copy of enclosure 6.9 of SP 200.37 had handwritten unreviewed, unapproved changes which had been followed during at least four quarterly calibrations.
[m) 2.
The procedure used to operate and calibrate the Tennecomp
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Gamma Spectrometry Systen had not been reviewed and approved.
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O Mr.
o.. H. Engelken January 3, !977 SMUD Reply to item A.1 Appendix B, Technical Specification 5.5.1 will be applied to the samples required in Table 2.6-2.
Procedures describing the sampling techniques to oe used for the gaseous' sources of the Waste Gas Decay Tanks,' Containment Purge, Condenser Air Ejector and Environmental Release Points (except Gland Steam Exhauster) are being developed at this time.
These procedures will be finalized, reviewed, approved and put into
'effect prior to March 31, 1977 The sampling procedure for the Gland Steam Exhauster is not being written at this time pending a resolution to Appendix B, item A, of this audit. This procedure will be written, reviewed, approved and put into effect within sixty (60) days of completing the modification to the system as described below.
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SMUD Reply to item A.2 Two methods are being investigated to resolve this problem to limit the maximum activity of a Waste Gas Decay Tank. The Waste Gas Surge Tank Radiation Monitor may be desensitized by a factor of approxi-mately 10-5 which will then be used as a monitor to limit the activitity
^s to a decay tank to.135,000 curies. This method is the preferred resolu-
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tion to the problem.
If the system is determined not to be reliable or impractical, an alternate method of sampling the waste tanks af ter each filling will be initiated. The expected date for full compliance by using one of the above methods and developing, reviewing and approving the procedure will be March 31, 1977 SHUD Reply to item A.3 The modifications described to resolve the audit comment in Appendix B, item A, should eliminate the need for an instrument description and calibration chart. The description of the Gland Steam Condenser j
Exhauster will be included within the Radiation' Protection Manual Section 3.6.4.2.2 within thirty (30) days of completing the modifications as described below.
SMUD Reply to item B'.1
. Surveillance Procedure SP 200.07 will be revised to have the correct calibration values included in the enclosure. The " working" procedure actually used to calibrate the gas monitors is Procedure I-604, " Gas Radiation Monitor Calibration". The enclosure 6.9 of procedure SP 200.07 and enclosure 7.6 of 1-604 are identical. The latter _ procedure was reviewed by the Plant Review Committee on December 8, 1976, and had several comments to be resolved. Both procedures will be completed, approved and put into I
effect prior to January 31, 1977 The instrument personnel will attend a N
training ss ssion that -describes how to properly change procedures according to the admis.?strative instructions. The instructor will specifically review s'
.the infractica described above and relate how this infraction affects other procedure changes.- The training will also include how each change is originated, reviewed and approved.
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f Mr. R. H. Engelken January 3, 1977
-SMUD Reply to item B.2 The procedure to calibrate the Tennecomp Gamma Spectrometry System was designated AP 308-7, reviewed and approved by the Plant Review Committee and approved by the Plant Superintendent on December 8,1976.
The procedure is now in effect.
t Appendix B of your letter states:
A.
Contrary to ANSI N13.1-1969, " Guide to Sampling Airborne Radioactive Materials in Nuclear Facilities", at the time of the inspection the sampling system for the Gland Steam Condenser Exhaust had several mechanisms installed upstream of the collection media which precluded the collection of a representative sample of iodine and particulates.
SMUD Reply to item A Above The Gland Steam Condenser Monitor (R 15021) has had considerable problems due to the high moisture content of the gas sample. The system gs takes a gas sample from the Gland Steam Exhauster and pumps the effluent
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to the atmosphere.
Several modifications have been performed on this
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system to eliminate the moisture from the gas sample prior to monitoring but the changes have only been marginally successful. A totally different approach may be necessary to resolve this problem. The proposed modifica-tion involves installation of a 4580 BTU /hr refrigeration uait on the Gland Steam Condenser monitor line and discharging the gas into the Auxiliary Building Exhaust System upstream of the particulate, HEPA and charcoal. filters and upstream of the Auxiliary Building Stack Radiation Monitor (R 15002). The monitor meets all the requirements and sensitivities of the original monitor installed on the Gland Steam Condenser Exhaust.
This change is being reviewed and evaluated under the 50.59 criteria within the Generation Engineering Department.
It is expected that this evaluation will be completed and a satisfactory proposal completed, reviewed and approved by March 31, 1977. Pending any other problems, the installation should be completed and the new system put into service by April 29, 1977 Respectfully submitted, 0,. 7 h b A
'I.k. Mattimoe Assistant General Manager and Chitf-Engineer JJM:RWC: sal
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