ML19345D395
| ML19345D395 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 12/09/1980 |
| From: | Trimble D ARKANSAS POWER & LIGHT CO. |
| To: | Reid R Office of Nuclear Reactor Regulation |
| References | |
| 1-120-07, 1-120-7, NUDOCS 8012150049 | |
| Download: ML19345D395 (5) | |
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.5 ARKANSAS POWER & LIGHT COMPANY POST OFFICE BOX 551 UTTLE ROCE ARKANSAS 72203 (501) 3714000 December 9, 1980 1-120-07 Director of Nuclear Reauor Regulation ATTN: Mr. Robert W. Reid, Chief Operating Reactors Branch #4 Division of Licensing U. S. Nuclear Regulatory Comm.
Washington, D.C.
20555
SUBJECT:
Arkansas Nuclear One - Unit 1 Docket No. 50-313 License No. DPR-51 Supplemental Information for Technical Specification Change Request dated i
March 9, 1979 (File: 1511.1,1511.3)
Gentle _n:
As a part of a Technical Specification change request submitted to you i
on March 9,1979, we had requested that the frequency of fish impingement samples be reduced from three times per week to two times per week during winter months.
Mr. Guy Vissing of your staff requested additional supporting information on this change.
Attached is an internal memorandum which provides this infonnation.
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We appreciate your assistance in processing this Technical Specification i
change.
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O Very truly yours, i
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David C. Trimble Manager, Licensing
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o ARKANSAS POMfER E LIGHT COMPANY INTMA COMPANY CORRampONDENCE November 25, 1980 om n n ry,
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CL-1339 fl0V P,81980 '
ARKANSAS P0iVER & LIGHT C0*
MEMORANDUM TECH. & ENV. SERVICES T0:
Mr. Charlie Adams FROM:
Sharon Tilley
SUBJECT:
Tech Spec Change for ANO Fish Impingement As you requested, I have made an analys'is of the winter fish impingement data.
I folicwed Mike Masnik's instructions (NRC) by getting the three day weekly average, then getting a two day weekly average for samples 1 and 2, 2 and 3, and 1 and 3.
I then calculated the percent over or under the three day average of the difference of each of the two day samples.
I have included a graph plotting the weekly percent of each sample indicating the points plus or minus 15% of the three day average.
I am including my work papers in case specific weekly numbers are needed to help evaluate the samples.
I worked in three winters data to help get a better trend analysis.
In the following Table, I listed each year's number and percent as well as the average of the three years. As you can see, the three sanples on the three year average are well within the 15% or 20% Mike Masnik suggested as accept-able.
AN0 Winter Fish Impingement 3 Year Average and Percent for 3 Day and 2 Day Samples Year Average Average Average Average of 3 1 and 2 2 and 3 1 and 3 1977-78 665326 743511 11.7 517144 (22.2) 726127 9.1 l
1978-79 3137194 3246342 3.4 2905922
( 7.3) 3259340 3.8 l
1979-80 527684 622653 17.9 518939 ( l.6) 441469 (16.3)
Total of 3 Yrs.
4330204 4612506 6.5 3942005 ( 8.9) 442G936 2.2 I am also including ti,e following table giving each year's monthly average and percent:
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4 CL-1339 Mr. Charlie Adams November 26, 1980 AN0 Winter Fish Impingement Three Year Monthly Average and Percent for 3 Day and 2 Day Samples Average Average Average Average Year Month of 3 1 and 2 2 and 3 1 and 3 1977-78 Oct.
23985 23115
( 3.6) 24385 1.6 24460 1.9 Nov.
29170 27207
( 6.7) 30949 6.0 29356 0.6 Dec. *1 536437 624723 16.4 382354 (28.7) 592930 10.5 Jan. *2 36064 37082 2.8 35653 (1.1) 35558 ( 1.4)
Feb. *3 39670 31384 (20.8) 43803 10.4 43823 10.4 Mar.
PLANT OFF - LINE -
1978-79 Oct.
4616 5535 19.9 3921 (15.0) 4397 ( 4.7)
Nov.
6746 5760 (14.6) 7404 9.7 7078 4.9 Dec.
44006 47363 7.6 44879 1.9 39782 ( 9.5)
Jan.
638748 671205 5.0 654993 2.5 590049
( 7.6)
Feb.
1426528 219640 (84.6)1511755 5.9 1408592 ( 1.2)
Mar.
1016450 1156940 13.8 682970 (32.8) 1209442 18.9 1979-80 Oct. *4 972 858 (11.7) 1083 11.4 976 0.4 Nov. *5 39125 39920 2.0 27759 (29.0) 49696 27.0 Dec.
379204 450469 18.7 381950 0.7 305195 (19.5)
Jan.
9816 12770 30.0 6675 (31.9) 10006 1.9 Feb. *6 71739 83876 16.9 82330 14.7 49013 (31.6)
Mar.
26828 34760 29.5 19142 (28.6) 26583 ( 0.9)
- 1 1st week had only 1 sample day, 3rd week had 2, 4th week had 4.
- 2 4th week had only 2 sample days.
- 31st week only sample, plant off-line rest of month.
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- 4 4th week plant off-line, no sample for that week.
- 51st and 2nd weeks plant off-line, no sample for those weeks.
- 61st week only 1 sample day, 2nd week only 2 sample days.
On a monthly basis, the following is observed out of 17 months data:
l Sample Sample Sample l
1 and 2 2 and 3 1 and 3 9 mo. within 15%
12 mo. within 15%
13 mo. within 15%
13 mo. within 20%
12 mo, within 20%
15 mo. within 20%
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CL-1339 Mr. Charlie Adams. November 26, 1980 On a weekly basis, the following is obse.ved out of 58 weeks valid data:
Sample Sample Sample 1 and 2 2 and 3 1 and 3 30 wks. within 15%
29 wks. within 15%
44 wks. within 15%
41 wks. within 20%
38 wks within 20%
48 wks. within 20%
If I can be of further help, please let me know.
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