ML20137R135
| ML20137R135 | |
| Person / Time | |
|---|---|
| Site: | Byron  |
| Issue date: | 11/21/1985 |
| From: | Shafer W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Reed C COMMONWEALTH EDISON CO. |
| References | |
| NUDOCS 8512050434 | |
| Download: ML20137R135 (2) | |
See also: IR 05000454/1985038
Text
,*. .-
NOV 21 G85
l
1
Docket No. 50-454
Docket No. 50-455
)
Commonwealth Edison Company
ATTN: Mr. Cordell Reed
Vice President
Post Office Box 767
Chicago, IL 60690
Gentlemen:
SUBJECT:
BYRON STATION UNITS 1 AND 2, RESPONSE TO INSPECTION REPORTS
NO. 50-454/85038 AND NO. 50-455/85042, NRC DOCKET NO. 50-454
AND NO. 50-455
Reference: -(a) Letter from W. D. Shafer to Cordell Reed dated October 1, 1985
(b) Letter from D. L. Farrar to James Keppler dated October 31, 1985
Your response to the Notice of Violation associated with the inspection
conducted by Mr. L. J. Hueter on August 28-29, 1985, of activities at Byron
Station requests our reconsideration of the validity of Violation No. 2
for reasons stated in your response.
In consideration of your request, we
wish to clarify one item in your response and request additional information,
not previously available, to continue our review.
In your response you state it is your understanding that the violation is
predicated on the belief that initiation of the circulating water blowdown
radiation monitor alarm indicates a release in excess of allowed limits, and
therefore, requires immediate action per Technical Specification 3.11.1.1,
and that such a belief is not correct.
However, we wish to inform you that
the violation is not predicated on the specific alarm setpoint but on the
bases described below:
Liquid radwaste having a concentration of 30 times MPC was pumped into
the circulating water blowdown line.
Intended dilution flow did not exist.
The circulating water blowdown monitor alarmed within one minute,
indicating a problem.
An' additional nine minutes elapsed before it was determined that a
radwaste release had been initiated (causing the alarm) and the release
terminated.
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NOV 21 E85
The blowdown line was closed at'the downstream end and the line filled
with dilution water providing an unknown mixing of the 2700 gallon
radwaste bolus before release to the river.
A sampling interval of 20 minutes compared with an expected discharge
transit-on the order of a minute, depending on dilution.
JYou assert in your response that you have subsequently performed additional
analyses that demonstrate dilution of the bolus in the circulating water
blowdown pipe was sufficient.
Please submit the analysis for our further
evaluation.
Sincerely,
W. D. Shafer, Chief
Radiological Protection Branch.
cc:
D. L. Farrar, Director
of Nuclear Licensing
V. I. Schlosser, Project Manager.
.
Gunner Sorensen, Site Project
Superintendent
R. E. Querio. Plant Manager
DCS/RSB (RIDS)
Licensing Fee Management Branch
Resident Inspector, RIII Byron
_
_ Resident Inspector, RIII
Braidwood-
Phyllis Dunton, Attorney
General's Office, Environmental
Control Division
D.-W. Cassel, Jr., Esq.
Diane Chavez .DAARE/ SAFE ~
Steve Lewis, ELD-
L. 01shan,'NRR-LPM
H. S. Taylor, Quality Assurance
Division 1
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