ML19317G935
| ML19317G935 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 07/15/1977 |
| From: | Reid R Office of Nuclear Reactor Regulation |
| To: | Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| References | |
| NUDOCS 8004020592 | |
| Download: ML19317G935 (3) | |
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July 15,1977 DISTRIBUTION:
Docket File NRC PDR L PDR Docket No.;
50-312 ORB #4 Rdg TCarter E
RReid f1 RIngram f
Sacranento M1nicipal Utility District L01shan k..
ATTk: Mr. J. J. Matticoe MGrotenhuis L
Assistant General Manager Attorney, OELD and Chief Engineer 01&E (3) i+
6201 S Street DEisenhut b
P. O. Box 15830 TBAbernathy Sacra 9 ento, California 95813 JRBuchanan ACRS (16)
Gentlemen:
Gray File RE: RANCHO SECO NUCLEAR GENERATING STATION Although you are required to conitor chlorine usage and report
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non-routine chlorine releases, you are generally not required to subnit the routine chlorine monitoring data to the NRC.
However.
information on the routine disenarge of residual chlorine would be helpful to the NRC in tne preparation of Standard Environmental Technical Specifications, as well as in generic evaluation of changes to existing Environnental Technical Specifications.
It would
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be useful in assessing whetner there is any environmental impact related t various methods of chlorine usage and in achieving our goal of
.11 mum regulation regarding Environmental Technical Specifi.tions.
We would appreciate your sending the infomation listed in the enclosure te this letter on a voluntary one-time basis only within the next 60 days.
Since this is not related to a licensing action, four copics of the infor. nation will suffice.
If the infomation is already available in report fom prepared for some other purpose, copies of such a report will se satisfactory.
This request for generic Information was approved by GA0 under a il b"lahket clearance nunber B-100225 (Roo72); this clearance expires July 31, 1977.
Sincerely, Robert W. Reid, Cnief f-2
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@ u. s. oovanNusNT PRINTfNG OFFICES 1976-626624
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CHLORINE MONITORING DATA h
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i 1.
Frequency and duration of chlorination for each system treated b
(i.e., main condensers, auxiliary service water, etc.).
Al so P
inoicate frequency of monitoring, and location and timing of sample collection in relation to initiation of chlorination.
2.
Type of analysis used (i.e., amperometric, colorimetric, continuous monitorinc, etc.) by referencing ASTM on standard methods where applicable.
Where more than one type of analyses has been used, indicate effective dates of each method.
3.
Sensitivity and precision of each analysis procedure.
xen r
4 Comnents, where applicable:
a.
Date chlorination progra 1 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 procrans, including equipment failures, sensitivity problems, and feed rate guidelines.
d.
Other comments.
5.
For the period 1/1/76 through 12/31/76, list all residual chlorine discharge concentrations 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.
6.
If chlorine usage has not been initiated or has been curtailed during tnis report period (1/1/76 through 12/31/76), report data for the time period of use in 1976 or state that no chlorine has been used at the facility (as appropriate).