ML20101C267
| ML20101C267 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 11/28/1984 |
| From: | Lee O PUBLIC SERVICE CO. OF COLORADO |
| To: | Johnson E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| RTR-NUREG-0737, RTR-NUREG-737, TASK-2.F.1, TASK-TM P-84506, TAC-57944, NUDOCS 8412210016 | |
| Download: ML20101C267 (3) | |
Text
'P.
.y N
i PUBLIC SERVICE COMPANY OF COLORADO P.
O. BOX 840 DENVER.
COLORADO 8020s
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November 28, 1984 vice enesiocur y
Unit No. 1 P-84506 Regional Administrator u ear Regulatory Commission
$h$ON$ M 611 Ryan Plaza Drive, Suite 1000 Ar1ington, Texas 76011 DEC - 7 IMd Attn: E. H. Johnson y
DOCKET NO. 50-267
SUBJECT:
NUREG-0737 II F.1.1 Noble Gas Accident Monitoring Instrumentation
REFERENCES:
- 1) P-84191, Warembourg to Johnson dated July 2,1984
- 2) G-84408, Johnson to Lee dated October 24, 1984
Dear Mr. Johnson:
Since our letter of reference 1, we have investigated the possibility of replacing the existing reactor plant exhaust detector with an extended range monitor.
In the original proposal, we had planned to dilute the incoming air by approximately 200 times to extend the range of the existing monitor to meet the requirements of NUREG-0737, item II.F.1.1.
In talking with the original manufacturer of the
- monitor, it was found that a new detector is in the final stages of development that could measure noble gas concentrations up to 10E03rci/cc.
Replacing the existing detector with a higher range monitor is more desirable than a dilution system due to simplified design and lack of added error due to flow control instruments used to get accurate flow dilution.
Our proposed schedule is to evaluate the operation and final specifications of this new detector and provide a detailed design within 6 months of this letter on the extended range detector or a dilution system if we are unable to use this detector.
The new detection system will then be inservice by the end of the 4th 7: walk 4g A vs p
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refueling outage..
If you have any questions on this subject, please contact Mr. M. H. Holmes at (303) 571-8409.
Sincerely, 0
Vice President.
Electric Production ORL/KD:pa
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Y UNITED STATES OF: AMERICA
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NUCLEAR REGULATORY C0ttilSS10N In the Matter'
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Public Service Company of Colorado Docket No. 50-267 Fort St. Vrain Unit No. 1 AFFIDAVIT 0.
R. Lee, being duly. sworn, hereby deposes and says that he is Vice President of Public Service Company of Colorado; that he is duly I
authorized to sign and file with the Nuclear Regulatory Commission-the attached response to NUREG-0737 II F.1.1; that he is familiar with-the content thereof; and that the matters set forth therein are true and correct to the best of his knowledge, information and 4.
' belief.
O. R. Lee Vice President i
STATE OF
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COUNTY OF BW l-Subscribed and sworn to before me, a Notary Public on this.70 A
]
day of hwaM
, 1984 l
l Laa-Nbtary Public My commission expires A f 4 / [., 198].
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