ML19256D585
| ML19256D585 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 09/16/1975 |
| From: | Arnold R METROPOLITAN EDISON CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML19256D582 | List: |
| References | |
| NUDOCS 7910190551 | |
| Download: ML19256D585 (2) | |
Text
. _ _. - - -...
/,"Aa %, Mr; s c..:
'ka :..
-,.,u r.cc.,u
,9 M-..<OPOLITAN EDISON COMPANY x - w..mcr u g.: -
u w : ~.- : -m..
r OFFICE BOX 542 RE ADING, PENNSYLVANI A 19603 TELEPHONE 215 - 929-3601 September 16, 1975 GQL 1496 Mr. J. P. O'Reilly Office. of Inspection t.nd Enforcement, Region I U. S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pennsylvania 19h06
Dear Mr. O'Reilly:
Three Mile Island Nuclear Station Unit 1 (D!I-1)
Operating License #DPR-50
=
Docket No. 50-289 Inspection #75-16 This letter and accompanying enclosure are in response to your inspection
- letter of August 1L,197,5, concerning Mr. R. J. Everett's inspection of
'IMI-1 and the results of that inspection.
Please note that this response is being submitted six days late as agreed upon in our telephone conversation of Septe=ber 10, 1975 Sincerely,
/)
0, (l
Q ie R. C. A.nold P
Vice President
(_
RCA:CWS:tas
Enclosure:
Response to Apparent Violaticn 1452 005 File:
.. 1.1 / T.7.3.2.1 h,4 7910190
ENCL 00URE
"~ [o.tolitan Edisen Oc pany (Met-Ed) se Mile Island nuclear Station (U.I)
-i 6" Eh #ii(D
~4D' )[
oveket "o. 50-289 D
g hU. ) J
~
3~ J(
License No. DPR-50 o
'nspection No. 50-289/75-16 R2sponse to Description of Apparent Violation Auparent Violation Contrary to Technical Specification, Section 2.3.1.b, the liquid gross activity monitor RM-L6 was not set to alarm and automatically close the vaste dischar6e valve WDL'-V-257 prior to exceeding the limits specified in 10 CFR Part 20, Appendix 3 for unrestricted areas, as the alarm setting was too hi h.
6 Respense The alarm setpoint vas.=aintained at a level based on the Technical Specification limit of 10 curies per effluent tank. A lower level alarm setpoint based on the most restrictive isotope for this application listed in 10 CFR 20 was considered impractical due to repeated high contamination levels in the RM-L6 sample chamber and the RM-L6 instrument lov scale detectable level.
RM-L6 sensitivity range is from 1.hE-6 uCi/cc to 1.LE-2 uCi/cc based on Csl37 assuming a 200 cpm back round.'
Corrective action to date has included the insta11atira cf a new 6
type sampler with a replaceable liner for RM-L6, submittal of n engineering ign change to allow sample cha=ber flushing capability, su,tmittal of a design
.nge to the control rocm monitor rate meter to allow a variable alar = setpoint,
. proposed procedural changes to incorporate the use of the above =cdifications.
~
would like to point out that the alar = setpoint of RM-L6 only applies during the release of licuid radioactive vaste.
It is anticipated th?t the afore=entioned changes vill be installed and incorporated by October 25, 1975 At that time, it is felt that the capability
~
vill' exist to maintain RM-L6 background sufficiently lov and concurrently use a variable alarm setpoint to take credit for minimum available dilution.
- j...
These modifications vill insure co=pliance with Secticn 2.3.1.b of the h
Technical Specifications.
F It should be acted that prior to any discharge frem the subject effluent tanks samples were taken to ensure that all of the discharge concentration limits of 10 CFR 20 and the *cchnical Specifications were met, and these types cf samples vill continue to be taken until such time as the above described =odifications are imple=ented.
1452 006 8