ML20098G835
| ML20098G835 | |
| Person / Time | |
|---|---|
| Site: | River Bend  |
| Issue date: | 10/03/1984 |
| From: | Wetterhahn M CONNER & WETTERHAHN, GULF STATES UTILITIES CO. |
| To: | Cole R, Cotter B, Linenberger G Atomic Safety and Licensing Board Panel |
| References | |
| CON-#484-292 OL, NUDOCS 8410050583 | |
| Download: ML20098G835 (2) | |
Text
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LAW OFFICES GONNER Be WETTERHAHN. P.G.
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October 3, 1984
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g,g,03333.oO B. Paul Cotter, Jr., Chairman Dr. Richard F. Cole Atomic Safety and Licensing Atomic Safety and Board Panel Licensing Board Panel U.S. Nuclear Regulatory U.S. Nuclear Regulatory
-Commission Commission Washington, D.C.
20555 Washington, D.C.
20555 Mr. Gustave A. Linenberger Atomic Safety and Licensing Board Panel U.S. Nuclear Regulatory Commission Washington, D.C.
20555 In the Matter of Gulf States Utilities Company (River Bend Station, Units 1 and 2)
Docket Nos. 50-458 and 50-459 0L Gentlemen:
Based upon recent information regarding the discovery of Asiatic clams in one unit of the Big Cajun No. 2 Power Plant across the river from River Bend Station, Applicants are making the attached change to paragraph 21 of its testimony on Asiatic clams to reflect this information.
At the same-time, Applicants are making an editorial change in paragraph 23 of the same testimony.
Both of these changes are reflected in the attached page.
Sincerely, b*
N (Q
Mark J. Wetterhahn Counsel for the Applicants MJW:sdd Enclosure cc:
Service List 8410050583 841003 h
PDR ADOCK 05000458 T
, ~.
21.
Several' industrial users in the vicinity were contacted to determine whether they have observed clams in their systems using river water.
Big Cajun No.
2, a power plant directly across the - river, consists of three units.
The design of two of the Big Cajun units is similar to that of River Bend Station in that the units use clarified chlorinated river water for auxiliary and condenser cooling. The third unit, which uses unchlorinated once-through cooling for its condensers, has had no fouling problems related to Corbicula; however, recently, some Corbicula were discovered in the condenser during a routine outage inspection.
This recent discovery does not change our conclusion regarding the effectiveness of the design of River Bend and its program for control of Corbicula because of differences between this unit and River Bend.
22.
Also relevant is the experience of Crown-Zellerbach, a paper mill.which is located on the east shore two miles downstream of the River Bet.; Station intake. This facility generates its own electricity.
Crown-Zellerbach circulates more river water through its plant than River Bend, and takes its makeup water suction from a position in the river nearer the bottom where Corbicula would be more likely to be found.
They reported to Gulf States that in 17 years they had never observed even a single clam in any internal plumbing at their facility.
If,
- indeed, Crown-Zellerbach entrains pediveligers, then their clarifiers (very much like the clarifier at-River Bend Station) and/or continuous low-level chlorination must be entirely effective.
23.
Considering the River Bend intake design and clarification equipment described below, the only probable means by which Corbicula could enter River Bend Station
,