ML19254E512
| ML19254E512 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 06/15/1979 |
| From: | Warembourg D PUBLIC SERVICE CO. OF COLORADO |
| To: | Kuzmycz G Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19254E505 | List: |
| References | |
| P-79130, NUDOCS 7911010409 | |
| Download: ML19254E512 (2) | |
Text
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public senice company e CoDorado P. O. Box 361, Platteville, CO 80651 June 15, 1979 Fort St. Vrain Unit No. 1 P-79130 Mr. Geo'rge Kuzmycz, Project Manager U.S. Nuclear Regulatory Commission Division Project Management Special Projects Washington; D.C.
20555
Subject:
Gascous Effluent Monitors
Dear Mr. Kuzmycz:
Per your informed inquiry concerning the radiation monitors at Fort St. Vrain, we have prepared the attached table in response to the eight (8) questionc you forwarded.
We have taken a quick look at the high-range stack monitor, RT-7324-2, and have concluded that if we were to release the entire primary coolant inventory out the plant stack assuming a 30,000 Ci design circulating activity, our high-range stack monitor would re-6 7
main on scale (%10 cpm versus a capability of 10 cpm for the monitor).
If you need any further information, please let me know.
Very truly yours, hn &A~b1 Don W. Warembourg }V Manager, Nuclear Production DWW/vt Enc.
I281 06' 79110104-09
FORT ST. VRAIN NOBLE GAS MONITORS Maximun Release Calibra-Reference Type De-Read Out Rate De-tion Fac-Radio-Alarm Monitor Location
.tector Range tectable tor nuclide Se tpo int _jhlarm Function System or G. M.
or Min. - Max.
Plant Scintila-Ran ge,
cpm /pC1/
Alarm or Iso-3 I.D.
Area tion CPM C1/sec.
cm cpm lation, etc.
RT-7324-1 Reactor Plastic 10 1 to 107 5.9
- 2.7E 7 85Kr/133Xe 77,000 Cloce FV-6351, Plan t Scintila-cpm cpm divert gas to Exhaust tion gas waste vacuum tank.
Shuts down out-RT-7324-2 Reactor Plastic
'10 1 to 10 152.4
- 1.05E 6 85Kr/133Xe 2,000 side vent and 7
Plant S cin tila-cpm begins recircu-Exhaust tion lation of venti-lation.
RT-31193 Air Ejec-Plastic 10 1 to 10 3.26E-2 4.35E 6 85Kr/133Xe 500 cpm Alarm Only.
7 tor Ex-S cin tila-Flow Rate haus t tion 1.42E4 cc/sec.
RT-4E03 Reactor Plastic 101 to 106 0.29
- 5.6E 6 85Kr/133Xe 3,000 Local alarm only.
PING P lan t S cin tila-cpm Exhaust tion RT-6314-2 Gas Plastic 10 1 to 10 1.1E-1 3.45E 6 85Kr/133Xe 2.3 x closes FV-6351 anu 7
Waste S cin tila-Flow Rate 106 directs gas to gas Ps)
Exhaus t tion 3.78E4 waste vacuum tank.
CE) cc/sec.
RT-7312 1-PCRV Bot-Plastic 10 1 to 10 N/A 4.35E 7 7
85Kr/133Xe 1000 S tops primary
[g[,
5-Point tom llead Scintila-Area cpm coolant flow to An-2-AI Roon tion Monito r alytical Instrumen-ty) 3-ilP Area tation panel.
4-CR 5-Turbine Deck Area
- These calculations are based on a reactor building exhaust flow of 1.6E7 cc/sec.