ML19326C263

Responds to NRC 770715 Request for Chlorine Monitoring Data Info.Record of Residual Chlorine Discharge Concentrations for 1976 Encl

ML19326C263
Person / Time
Site:	Arkansas Nuclear
Issue date:	09/09/1977
From:	Reuter D ARKANSAS POWER & LIGHT CO.
To:	Desiree Davis Office of Nuclear Reactor Regulation
References
NUDOCS 8004220830
Download: ML19326C263 (5)

Text

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H ELPIN G BUILO ARKANSAS A RK ANS AS POWER & LIGHT COM PA NY PC. Box 551 LivTLe AOCK. A AK AN AS 72203.(501)371 4000 September 9, 1977

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ATIN: Mr. D. K. Davis, Acting Chief Operating Reactors Branch #2 D y\@s ..

l U. S. Nuclear Regulatory Commission l Washington, D. C. 20555 Subj ect: Arkansas Nuclear One-Unit 1 Docket No. 50-313 License No. DPR-51 Chlorine Monitoring Data Infomation (File: 0900)

Gentlemen:

In response to your letter of July 15, 1977, the following is sub-mitted for your infomation. Your questions are restated for clarity and are followed by our responses.

ITEM 1 i Frequency and duration of chlorination for each system treated (i.e.,

main condensers, auxiliary service water, etc.) . Also indicate fre-quency of monitoring, and location and timing of sample collection in relation to initiation of chlorination.

RESPONSE

The frequency and duration of chlorination is 20 minutes per day. Grab samples are collected twice per week at the south end of the discharge structure during chlorination.

ITEM 2 Type of antlysis used (i.e., amperometric, colorimetric, continuous monitoring, etc.) by referencing ASE on str.ndard methods where appli-cable. Where more than one type of analyses has been used, indicate effective dates of each method.

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RESPONSE

The Orthotolidine (Hach Kit) method of analysis was used from July 1974 until April 1977 at which time the Amperometric standard method #409 was incorporated and is still being used.

ITEM 3 Sensitivity and precision of each analysis procedure EESPONSE A. Orthotolidine method - C.05 ppm B. Amperometric method - 0.03 ppm ITEM 4 Comments, where applicable:

a. Date chlorination pro; ram initiated,

b. Additional methods used for maintaining condenser cleanliness, such as mechanical methods, heat treatment and backwashing. Include approximate frequencies of each method,

c. Problems with chlorination and monitoring programs, including equip-ment failures, sensitivity problems, and feed rate guidelines,

d. Other comments.

RESPONSE

a. The chlorination program was initiated in July 1974.

b. There are no additional methods used for maintaining condenser cleanliness,

c. There have not been any prob 1 cms with the chlorination and monitoring programs.

d. No other comments.

ITEM S For the period 1/1/76 through 12/31/76, list all residual chlorine discharge cencontrations recorded, species of residual chlorine (i.e., free, combined or total residual) measured, date and time of sample and time of chlorination. In those unusual cases where dilution factors are required to calculate the concentration at the station discharge, report the calculated values, indicating this method has been used.

'Mr. D. K..D3vis O Septaber 9,1977 1-097-7

Date Time Free C12 Total C12 1/6/76 1320 .05 .05 1/8/ 1315 .03 .03 1/14 1315 .02 .08 1/16 1340 .08 .1 1/20 1320 .08 .12 1/28 1320 .01 .06 1/30 1325 .01 .06 2/3 1325 0 . 05 2/5 1300 .02 .05 2/10 1315 0 0 2/12 1320 .02 .05 2/18 1300 0 0 2/19 1400 0 .01 2/24 1315 0 0 2/26 1315 0 0 3/2 1300 .02 .03 3/4 1300 0 .02 3/9 1355 0 0 3/12 1330 0 0 3/lb 1310 .02 .05 3/18 1310 0 0 3/23 1345 .03 .05 3/25 1515 .03 .05 3/30 1315 .05 .35 4/1 1315 0 -

0 4/14 1445 .01 .01 4/15 1320 .02 .03 4/20 1350 .01 .02 4/22 1300 .03 .04 4/29 "

1315 0 0 4/30 1325 .02 .03 5/4 1255 0 0 5/6 1315 0 0 5/11 1320 .01 . 03 5/14 1355 .03 .03 5/19 1320 0 0 5/20 1320 0 0 5/25 1315 .01 .01 5/28 1310 0 0 6/1 1315 .025 .05 6/4 1320 0 0 6/8 1315 .03 . 03 6/17- 1320 0 0 6/18 1315 0 0 6/24 1315 0 0 6/30 1320 0 0 7/1 1325 0 0 7/7 1310 0 0

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7/8 1310 0 0

.7/14 1310 .03 . 03 7/15 1340 0 0 7/20 1330 0 0 7/22 1340 0 0 7/26 1330 .05 .05 7/29 .1315 .02 .02 8/3 1330 .02 .02 8/5 1330 0 0 8/11 1400 0 0 8/13 1520 0 0 8/19 1320 0 0 8/20 1320 0 0 8/26 1345 .05 .05 8/27 1515 .05 .05 9/2 1325 0 0 9/3 1310 .02 .03 9/8 1315 0 0 9/16 1545 0 0 i 9/22 1325 0 ,. 0 9/24 1325 0 0 9/30 1320 0 0 10/1 1300 .01 .05 10/5 1420 0 0 10/8 1410 0 0 10/12 1325 0 0 l 10/14 1330 0 0 4 10/20 1320 0 0 10/21 1320 0 0 l 10/26 1410 .03 .03 10/28 1335 0 0 11/2 1340 0 0 11/4 1420 0 0 11/9 1255 . 01 .02 11/18 1510 .01 .03 11/19 1620 0 0 11/29 1355 0 0 12/1 1600 0 0 12/3 1315 0 0 12/7 1315 0 0 12/10 1315 . 05' .05 12/14 1300 0 0 12/16 1400 0 0 12/21 1420 .05 .05 12/23 1375 .05 .05 12/28 1425 .05 .05 12/30/76 1500 .02 .05

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S- Scpterbar 9,1977 1-097-7 ),

ITEM 6 If chlorine usage has not been initiated or has been curtailed during this report period (1/1/76 through 12/31/76), report data for the time Period of use in.1975 or state that no chlorine has been used at the facility (as appropriate).

RESPONSE

Our chlorination program was not curtailed during the period.

Should there be any other questions or infomation needed, please do not hesitate to let me know.

Very truly yours, Donald A. Rueter Manager, Licensing DAR:REI:tw l

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