ML20106A638
| ML20106A638 | |
| Person / Time | |
|---|---|
| Site: | Byron  |
| Issue date: | 01/30/1985 |
| From: | COMMONWEALTH EDISON CO. |
| To: | |
| Shared Package | |
| ML20106A633 | List: |
| References | |
| NUDOCS 8502110312 | |
| Download: ML20106A638 (4) | |
Text
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e ATTACHMENT 24 RADIATION MONITORING INSTRUMENTATION 1.
Table 3.3-6 ( pg. 3/4 3-40 ) Radiation Monitoring Instrumentation for Plant Operations In Item 5 on Table 3.3-6 change the Alarm / Trip Setpoint from 6 1.0 E-5 uCi/cc to 6 2mR/h. The original calculation for the control room air intake process radiation monitors (ORE-PR031, ORE-PR032, ORE-PR033, and ORE-PR034) alarm setpoint was based on semi-infinite noble gas cloud assumptions. Since we are dealing with a finite area (the control room) a correction needs to be applied to correlate the submersion dose rate in the control room to a finite noble gas cloud. Based on a finite cloud assumption, the current Tech Spec alarm setpoint of lx10-5 microcuries per cc correlates to a dose rate of.01 mR/hr.
This ultra conservative setpoint is causing unnecessary LER(s) as the PR monitor is going into an alarm / interlock condition with normal background radiation. In addition, this setpoint is not consistent with the Standardized Tech Specs limit of 2 mR/hr. Therefore, it is requested that the Standard Tech Spec limit of 2 mR/hr be applied to the Byron control room air intake monitors.
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s TA8tE 3.3-6 RA0lAT*0N MONITORING INSTRUMENTATION FOR PLANT OPERATIONS
!c MININUM l3 CilANNELS CitANNELS APPLICABLE ALARM / TRIP i
fuMCil0NAL UNII TO 1 RIP / ALARM GPERA8tE MODES SEIPolNT ACTION 1.
Fuel Building isolation-Radioac tivi ty-liigh - and Criticality (ORE-AR055/56) 1 2
<5 mit/h 29 4
2.
Containment Isolation-Containment Radioactivity-liigh (IRE-ARoll/12) 1 2
All
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26 3.
Gaseous Radioactivity-RCS Leakage Detection
{
-(IRE-PRO 118)
N.A.
I 1, 2, 3,'4 M.A.
28
'T 4.
-Particulate Radioactivity-8 905 teakage Detection-(IRE-PRO 11A)
N.A.
I 1, 2, 3, 4 N.A.
28 4
5.
Main Control Room Isolation-
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Outside Air lutake-Gaseous Radioactivity-High IAM (ORE-PR0310/328 and ORE-PR0338/348) 1 2 per All 27 intake A ',4,
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ATTACHMENT 25 CONTAINMENT ISOLATION VALVES 1.
Table 3.6-1 (pg. 3/4 6-22) Containment Isolation Valves Add a "#" sign to valves 1PR002E, 1PR033A, IPR 033B, IPR 002F, 1PR033C, and 1PR033D on Table 3.6-1, page 3/4 6-22. These i
valves are located around the equipment hatch and are required to be opened periodically for sampling.
,.c 9;T;; s-TA81.E 3.6-1 (Continued)
CONTAINMENT ISOLATION VALVES MAXIMUM PENETRATION vat.VE NO.
FUNCTION ISOLATION TIME (SEC) 8.
Remote Manual (Continued) 59 ISI8802A" Hot Lag Safety Injection N/A 73 1518802S" Hot Leg Safety Injection N/A 60 15I8835" Hot Leg Safety Injection N/A 50 ISI8809A" RH Cold Leg Injection N/A 51 15I88098" RH Cold Leg Injection N/A 66 MI8840" Hot. Leg Safety Injection N/A 100 1AF013A*
Feedwater N/A 100 1AF013E" Feedwater N/A 101 1AF0138" Feedwater N/A 101 1AF013F" Feedwater N/A
'02 1AF013C" Feedwater N/A 102 1AF013G" Feedwater N/A 99 1AF0130" Feedwater N/A 99 1AF013H" Feedwater N/A i-9.
Manual 37 1CV8346" RCS Loco Fill N/A I3 IVQOl6 Instrument Penetration N/A I3 IVQO17 Instrument Penetration N/A I3 IVQ018 Instrument Penetration N/A 13 IVQ019 Instrument Penetration N/A 15 1RYO75 Instrument Penetration N/A 30 1)dM190 Make-Up Demin N/A 57 1FC009 Spent Fuel Pool Cleaning N/A 57 1FC010 Spent Fuel Pc--.1 Cleaning N/A 32 IFC011 Spent Fuel: Pool C1eaning N/A l
32
'1FC012 Spent Fuel Pool Cleaning N/A 77 1M50210*
Main Steam N/A 3
78 IM5021A*
Main Steam N/A 85 1MS0218*
Main Steam N/A l
86 1M5021C" Main Steam N/A AL IPR 002E #
Process Radiation N/A AL IPR 033A di Process Addiation N/A D
AL-1PR0338 #
Process Radiation N/A i~
AL IPR 002 Fat Process Radiation N/A
-AL 1PR033C#
Process Radiation N/A i
.1PR0330#
Process Radiation
- N/A l
J.
' BYRON - UNIT 1-3/4 6-22
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