ML20002C636
| ML20002C636 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 03/17/1978 |
| From: | Skibitsky W CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| NUDOCS 8101100632 | |
| Download: ML20002C636 (3) | |
Text
9 wm t'
^
99
/
t consu m
(.
hj
'any 00bbESESOfE w
10JT e._... _.. _.., _ ~
....._.m..... _ ~....
..,..c_............
March 17, 1978
/,
N Mr James G Keppler Office of Inspection and Enforcement c
3 Region III US Nuclear Regulatory Coc=ission
..p 799 Roosevelt Road
',',I.
7 T k M
Glen Ellyn, IL 60137 DOCKET 50-155 - LICENSE DPR BIG ROCK POINT PLANT - RESPONSE TO IE REPORT 50-155/T8-01 By letter dated February 16, 1978, Consumers Power Company was requested to respond to one infraction discussed in IE Inspection Report 50-155/78-01. The purpose of this letter is to provide the required response.
Infraction Technical Specification 6.4.1.d requires that the radvaste effluent monitor alarm be set to warn of concentrations which exceed those listed in Colu=n II, Table II, Appendix B of 10 CFR 20.
Contrary to this requiremeni.. alam settings for 17 releases made during 1977 ex-ceeded the required levels.
Response
In accordance with Tachnical Specification 6.h.1.d a process liquid monitor system is provided to (a) give indication of radioactivity trends in process liquid streams which normally contain radioactive liquids, and (b) to warn the operator of radioactivity in process liquid streams that do not normally contain radioactive liquids.
This section specifies the alars point for any monitors intended to warn the operator of radioactivity in those process liquid streams that do not normally conte.4n radioactive liquids.
It identifies these monitors as the Radioactive Waste byste= Effluent to Canal, the Circulating Water Discharge and the Service Water Reten From Reacto1 Delosure. The alarm set points for these monitors are to be set, to warn the operator when concentrations are present which exceed those listed in Colu=n II, Table II, Appendix B of 10 CFR 20.
Ho@ever, one of Ok 5
(0 m.
- a. v ;.9 1
I 8101100632
- ~. ~.
~. _-
(1
^ !'
'l W : 2' these'three monitors,-the Radiot +1v't Waste System Effluent to Canal, is recog-
. nized to serve another purpose:
it is used in conjunction with the liquid waste
' disposal system Technical Specification 6.h.1'.d states:
"...This monitor shall provide an add'dional means of checking the activity of vastes being discharged...." Duri:.f the ' course of-a' planned release (the activity of which is analyzed in accordance with Technical Specification 6.5 2), the radioactive
- waste system effluent ts canal monitor is considered to be in a liquid stream
- normally containing radioactive liquid. As such, the alarm set point should be set.in accordance with'the results'of the liquid waste analysis'in order to provide an additional means of checking the _ activity of the vastes being dis-
. charged.
In summary, historical interpretation of 6.h.1.c is that the radwaste monitor has two functions:
1.
To monitor during periods of no release, at which times the alarm should be set at the limits from Column II, Table II, Appendix B of 10 CFR 20, and
'~
2.
To monitor during release of batches of radioactive liquid, at which times the alarm set point should be set to correspond to the activity of the liquid waste as determined by radioisotopic-analysis. This set point would include a factor of 2 to_ facilitate detection of activity greater than that shown
]!
by th'e analysis, yet sufficiently high to preclude spurious alarming.
Conflict with the above interpretation has not occurred previously; however,
[
it is apparent that Technical Specification 6.h.1.d could be edited to more u
clearly state this interpretation. To accomplish this, a proposed Technical Specifications change vill be submitted % Mey 1978.
Further, the alarm set point for the
'dvaste monitor during release of radioactive liquid batches v411, henceforth, be based upon the activity of the liquid being discharged utilizing a conservative factor of 2 to prevent spurious alarms.
Evaluation of the monitor operation and alarm setting during periods of no re-i_
lease will be forwarded in April 1978.
William S Skibitsky (S1 ned) 6
. William S Skibitsky Senior Licensing Engineer CC: Director, Office of Nuclear Reactor Regulation Director, Office of Inspection and Enforcement
?
4 e
v~,.
,m n
Olw//o x
e REGULATORY INFORl1ATION DISTRIBUTION SYSTEM (RItiS)
DIS 1RIBUTION FOR INCOMING MATERIAL 50-155 PEC: KEPPLER J G ORG: SKIBITSKY W S DOCDATE: 09/17/78 NRC CONSUMERS PWR DATE RCVD: 03/21/75 DOCTYPE: LETTER NOTARIZED: NO COPIES PECEIVED LTR 1 ENCL 1
SUBJECT:
RESPONSE TO NRC"S LTR DTD 02/16/78.
FURNISHING RESPONSE TO INFRACTION CITED IN IE INSPEC REPT #50-155/78-01, RE ALARM SETTINGS FOR 17 RELEASES MADE DURING 1977 EXCEEDED REQUIRED LEVELS.
PLANT NAME: BIG ROCK PT REVIEWER INITI AL:
XJM DISTRIEUTOR INITIAL: @
- DISTRIEUTION OF THIS MATERIAL IS AS FOLLOWS ******************
GENERAL DISTRIBUTION FOR AFTER ISSUANCE OF OPERATING LICENSE.
(DISTRIDUTION CODE AOOI)
FOR ACTION:
BR CHIEF ZIMMANN**W/7 ENCL
~%
hGFILE**W/Et.uI NRC PDR**W/ ENCL INTERNAL:
I & E**W/2-ENCL OELD**LTR ONLY
~
HANAUER**W/ ENCL CHECK **W/ ENCL EISENHUT**W/ ENCL SHAO**W/ ENCL BAER**W/ ENCL BUTLER **W/ ENCL GRIMES **W/ ENCL J COLLINS **W/ ENCL J.
MCGOUGH**W/ ENCL EXTERNAL:
LPDR'S CHARLEVOIX, MI**W/ ENCL TIC ++W.CNCL NSIC**W/ ENCL ACRS CAT B**W/16 ENCL f
DISTRIBUTION:
LTR 40 ENCL 39 CONTROL,NBR:
M * !'~" "
SIZE: 2P co********^************************
THE END P00R OR G Ml.
...