ML20099C758
| ML20099C758 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 10/30/1984 |
| From: | Gahm J PUBLIC SERVICE CO. OF COLORADO |
| To: | Johnson E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| B-84465, NUDOCS 8411200054 | |
| Download: ML20099C758 (2) | |
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s, public Service Company *F Cdendo 16805 WCR 19 1/2, Platteville, Colorado 80651 3
October 30, 1984 Fort St. Vrain Unit #1 P-84465 T3@ BOW 23 I
I Regional Administrator NOV - 71984 Reactor Project Branch Chief U. S. Nuclear Regulatory Commission d
611 Ryan Plaza Drive, Suite 1000 Arlington, TX 76011 Attn: Mr. Eric Johnson
SUBJECT:
MPC DETERMINATION FOR PARTICULATE RADIONUCLIOES
Dear Mr. Johnson:
In a recent audit of the Fort St. Vrain offsite Dose Calculation Manual (0DCM) by our Nuclear Facility Safety Committee (NFSC), a question was raised regarding the appropriate maximum permissible concentration (MPC) in air for particulate radionuclides.
Specifically, ELCO 8.1.lb, Radioactive Gaseous Effluent, Limiting Conditions for Operation, states that, "For purposes of calculating permissible release rates...MPC for halogens and particulates with half-lives longer than eight days will be reduced by a factor of 700 from their listed value in Table II, Column 1 of Appendix B to 10CFR20".
In reviewing NUREG-0472, Oraft,
" Radiological Effluent Technical Specifications for PWR's" and NUREG 0133, " Preparation of Radiological Effluent Technical Specifications for Nuclear Power Plants", which were used to develop the Fort St. Vrain ODCM, we can find no justification for the 700-fold reduction for particulate MPC's.
If the MPC reduction for particulates has a technical basis, we would like to receive the appropriate documentation so that our supporting information can be updated and strengthened.
If no basis exists for the MPC reduction, we do not feel that ELCO 8.1.lb should be retained as currently written, and we will submit an appropriate Technical Specification Change request in the near future to remove any reference to particulates in ELCO 8.1.lb.
L/
p1memih d/3 ew 3
rg i T '.
. /
4 Your prompt
- response is appreciated; please contact Mr. Michael Holmes at (303) 571-8409 f f you have any questions on this matter.
Sincerely',
/
/
. W. Gahm Manager, Nuclear Production Fort St. Vrain Nuclear Generating Station JWG/dlb