L-2021-110, Emergency Response Data System (ERDS) Changes
| ML21147A034 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 05/27/2021 |
| From: | Hess R Florida Power & Light Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| L-2021-110 | |
| Download: ML21147A034 (16) | |
Text
Florida Power & Light Company 9760 SW 344th St., Homestead, FL 33035 May 27, 2021 L-2021-110 10 CFR 50 Appendix E U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. C. 20555-0001 Re:
Turkey Point Units 3 and 4 Docket Nos. 50-250 and 50-251 Emergency Response Data System (ERDS) Changes Pursuant to 10 CFR 50, Appendix E, VI, 3.a, Maintaining the Emergency Response Data System, this letter notifies the NRC of addition and deletion of data points to/from the Emergency Response Data System (ERDS) Data Point Library Reference File for Turkey Point Units 3 and 4.
Turkey Point Units 3 and 4 share a common plant vent exhaust stack. A modification to replace RAD-6304, High Range Plant Vent Radiation Monitor, and R-14, Low Range Plant Vent Radiation Monitor, with redundant, dual-range monitors RAD-6304A and 6304B is in progress. The modification will also replace flow transmitter FT-6584 with redundant flow transmitters FT-6584A and FT-6584B. The modification will be implemented in two phases, one for each train of new equipment.
The first implementation phase for RAD-6304A and FT-6584A is complete. As a result, the following changes apply:
ERDS Data Point IDs shown in Attachment 1 Table 1 of this letter have been deleted from the Units 3 and 4 ERDS Data Point Library.
New ERDS Data Point IDs shown in Attachment 1 Table 2 have been added to the Units 3 and 4 ERDS Data Point Library.
pages 3-14 depict the full list of new Unit 3 and Unit 4 ERDS Data Point Library Points. Points associated with RAD-6304B and FT-6584B shown on Table 3, pp 6-8, and pp 12-14 will be added at a future date with a separate notification letter.
These changes were made on May 26, 2021. This information is provided pursuant to 10 CFR 50, Appendix E, VI, 3.a, which requires NRC notification within 30 days after the changes are completed. A second notification will be made after the second implementation phase is completed.
Please contact Mr. Robert Hess, Turkey Point Licensing Manager, at 305-246-4112 with any questions.
Si~
Robert Hess Licensing Manager Turkey Point Nuclear Plant cc:
Regional Administrator, Region II, USNRC Senior Resident Inspector, USNRC, Turkey Point Plant Florida Power & Light Company 9760 SW 344th St., Homestead, FL 33035
L2021110Attachment1 Page1of14
PlantVentStackRadiationMonitorsEmergencyResponseDataSystem(ERDS)Updates Overview:
EC280922ReplacesthePlantVentRadiationMonitors(RAD6304andR14)withredundantradiation monitoringsystemsprovidedbyMirion.ThenewMirionsystemsconsistofalowrangedetector(RAD 6304A1andRAD6304B1)andahighrangedetector(RAD6304A2andRAD6304B2).Therangesof theMirionsystemencompasstherangesoftheR14andEberlineRAD6304.Additionally,theflow element (FE6584) and flow transmitter (FT6584) that provide the signal for R6304FLO_A are upgradedaspartofEC280922.EC280922installsanewannubarandtworedundanttransmitters(FT 6584AandFT6584B).ERDSrequiresupdatestoaddressallofthesechanges.Table1documentsthe existingERDSPoints.
Table1:ExistingERDSPoints Description Units LowRange HighRange TP3Data Point TP4Data Point PlanVentGasActivity cpm
(µCi/cc) 10 (5E7) 1E+6 (1.5E3)
R14_A 3R14_A PlantVentGasGammaHi Range
µCi/cc 1E1 1E+5 R6304HR_A R6304HR_A PlantVentFlowRate cfm 0
1.5E+5 R6304FLO_A R6304FLO_A ImplementationofEC280922:
DuringtheimplementationofEC280922,therewillbetwopartialturnoverstooperations(PTOP1and PTOP2).Tosupporttheseturnovers,theERDSpointslibrarywillrequireupdateeachtime.Asaresult ofPTOP1changes,theexistingERDSpoints(SeeTable1)shallbedeletedandthenewRAD6304Aand FT6584AERDSpoints(SeeTable2)shallbeadded.FollowingPTOP1,implementationwillproceedto installRAD6304BandFT6584B.AsaresultofPTOP2changes,thenewRAD6304BandFT6584BERDS points(SeeTable3)shallbeadded.TheERDSpointsaddedunderPTOP1donotrequireupdateunder PTOP2.ThefulllistofnewPTN3andPTN4ERDSDataPointLibraryPointsarefoundinpages314.
Table2:NewERDSPointsPTOP1(FollowingDCSPhase2)
Description Units LowRange HighRange TP3Data Point TP4DataPoint PlanVentGasActivity LowRangeA
µCi/cc 1E7 1.0E1 P6304LR_A P6304LR_A PlantVentGasGamma HiRangeA
µCi/cc 1E4 1E+5 P6304HR_A P6304HR_A PlantVentFlowRateA cfm 0
1.5E+5 P6304FLO_A P6304FLO_A
L2021110Attachment1 Page2of14
Table3:NewERDSPointsPTOP2(FollowingDCSPhase3)
Description Units LowRange HighRange TP3DataPoint TP4Data Point PlanVentGasActivity LowRangeA
µCi/cc 1E7 1.0E1 P6304LR_A P6304LR_A PlantVentGasGamma HiRangeA
µCi/cc 1E4 1E+5 P6304HR_A P6304HR_A PlantVentFlowRateA cfm 0
1.5E+5 P6304FLO_A P6304FLO_A PlanVentGasActivity LowRangeB
µCi/cc 1E7 1E1 B6304LR_A B6304LR_A PlantVentGasGamma HiRangeB
µCi/cc 1E4 1E+5 B6304HR_A B6304HR_A PlantVentFlowRateB cfm 0
1.5E+5 B6304FLO_A B6304FLO_A NotethatpointsinstalledunderPTOP1(showningrayabove)areincludedinTable3toprovidea completelistofpointsfollowingtheimplementationofEC280922.ThepointsissuedunderPTOP1do notrequirerevisionunderPTOP2.
L2021110Attachment1 Page3of14
PTN3ERDSDataPointLibraryChanges:
TP3 DATA POINT LIBRARY REFERENCE FILE Date:
Reactor Unit:
TP3 Data Feeder:
N/A NRC ERDS Parameter:
EFF GAS RAD Point ID:
P6304LR_A Plant Spec Point Desc:
Plant Vent Gas Activity Low Range A Generic/Cond Desc:
Radioactivity Of A Released Gas Analog/Digital:
A Engr Units/Dig States:
µCi/cc Engr Units Conversion:
N/A Minimum Instr Range:
1E-7 Maximum Instr Range:
1E-1 Zero Point
Reference:
N/A Reference Point Notes:
N/A PROC or SENS:
P Number of Sensors:
1 How Processed:
Data Link Sensor Locations:
Auxiliary Building Alarm/Trip Set Points:
Utilizes three setpoints: Alert, High, and High-High. Setpoint values are determined by Radiochemist NI Detector Power Supply Cut-off Power Level:
N/A NI Detector Power Supply Turn-On Power Level:
N/A Instrument Failure Mode:
As-is Temperature Compensation For DP Transmitters N/A Level Reference Leg:
N/A Unique System Desc:
A Mirion NGM216S unit provides the plant vent low range gas activity. The NGM216 detector is a beta scintillation detector with a 12µm thick titanium foil facing a 1000cc volume vessel in a protective lead shielding. The sensitivity of the detector is 1E-7
µCi/cc to 1E-1 µCi/cc. The Alert and High setpoints can be adjusted based on the release permit for the Gas Decay Tank. The gas tank discharge valve is automatically closed upon actuation of the High setpoint of the selected NGM216 (P6304LR_A or B6304LR_A). Upon reaching the High-High Alarm setpoint monitoring of the plant stack is transferred to the NGM203S (P6304HR_A).
L2021110Attachment1 Page4of14
TP3 DATA POINT LIBRARY REFERENCE FILE Date:
Reactor Unit:
TP3 Data Feeder:
N/A NRC ERDS Parameter:
EFF GAS RAD Point ID:
P6304HR_A Plant Spec Point Desc:
Plant Vent Gas Gamma Hi Range A Generic/Cond Desc:
Radioactivity Of Released Gases Analog/Digital:
A Engr Units/Dig States:
uCi/cc Engr Units Conversion:
N/A Minimum Instr Range:
1.0E-4 Maximum Instr Range:
1.0E5 Zero Point
Reference:
N/A Reference Point Notes:
N/A PROC or SENS:
P Number of Sensors:
1 How Processed:
Data Link Sensor Locations:
Auxiliary Building Alarm/Trip Set Points:
Utilizes three setpoints: Alert, High, and High-High. Setpoint values are determined by Radiochemist NI Detector Power Supply Cut-off Power Level:
N/A NI Detector Power Supply Turn-On Power Level:
N/A Instrument Failure Mode:
As-Is Temperature Compensation For DP Transmitters N/A Level Reference Leg:
N/A Unique System Desc:
A Mirion NGM203S unit provides the plant vent high range gas activity. The NGM203 detection subassembly utilizes a flow-through ionization chamber within a lead shield. The sensitivity of the detector is 1E-4 µCi/cc to 1E+5 µCi/cc. The plant vent stack is the normal discharge path for: Unit 3 & 4 containment purge, auxiliary building exhaust, Unit 3 & 4 Steam Jet Air Ejectors and Unit 4 SFP. Note: Unit 3 SFP exhaust is through a dedicated stack.
L2021110Attachment1 Page5of14
TP3 DATA POINT LIBRARY REFERENCE FILE Date:
Reactor Unit:
TP3 Data Feeder:
N/A NRC ERDS Parameter:
NL Point ID:
P6304FLO_A Plant Spec Point Desc:
Plant Vent Flow Rate A Generic/Cond Desc:
Plant Vent Stack Flow Rate Analog/Digital:
A Engr Units/Dig States:
cfm Engr Units Conversion:
N/A Minimum Instr Range:
0 Maximum Instr Range:
1.5E+5 Zero Point
Reference:
N/A Reference Point Notes:
N/A PROC or SENS:
P Number of Sensors:
1 How Processed:
Data Link Sensor Locations:
Plant Vent Stack Near Top Alarm/Trip Set Points:
N/A NI Detector Power Supply Cut-off Power Level:
N/A NI Detector Power Supply Turn-On Power Level:
N/A Instrument Failure Mode:
As-Is Temperature Compensation For DP Transmitters N/A Level Reference Leg:
N/A Unique System Desc:
Plant vent flow is provided by transmitters FT-6584A (P6304FLO_A) and FT-6584B (B6304FLO_A) which independently measure the differential pressure across a single flow orifice installed in the plant vent stack. The signals are transmitted to the plant DCS where based on operator selection, the signal from FT-6584A or FT-6584B is then routed back to the NGM216S and NMG203S radiation monitors. The selected signal is then used by the NGM216S and NMG203S monitors to establish the monitors target sample flow rates.
L2021110Attachment1 Page6of14
TP3 DATA POINT LIBRARY REFERENCE FILE Date:
Reactor Unit:
TP3 Data Feeder:
N/A NRC ERDS Parameter:
EFF GAS RAD Point ID:
B6304LR_A Plant Spec Point Desc:
Plant Vent Gas Activity Low Range B Generic/Cond Desc:
Radioactivity Of A Released Gas Analog/Digital:
A Engr Units/Dig States:
µCi/cc Engr Units Conversion:
N/A Minimum Instr Range:
1E-7 Maximum Instr Range:
1E-1 Zero Point
Reference:
N/A Reference Point Notes:
N/A PROC or SENS:
P Number of Sensors:
1 How Processed:
Data Link Sensor Locations:
Auxiliary Building Alarm/Trip Set Points:
Utilizes three setpoints: Alert, High, and High-High. Setpoint values are determined by Radiochemist NI Detector Power Supply Cut-off Power Level:
N/A NI Detector Power Supply Turn-On Power Level:
N/A Instrument Failure Mode:
As-is Temperature Compensation For DP Transmitters N/A Level Reference Leg:
N/A Unique System Desc:
A Mirion NGM216 unit provides the plant vent low range gas activity. The NGM216 is a beta scintillation detector with a 12µm thick titanium foil facing a 1000cc volume vessel in a protective lead shielding. The sensitivity of the detector is 1E-7 µCi/cc to 1E-1 µCi/cc. The Alert and High setpoints can be adjusted based on the release permit for the Gas Decay Tank. The gas tank discharge valve is automatically closed upon actuation of the High setpoint (P6304LR_A or B6304LR_A). Upon reaching the High-High Alarm setpoint monitoring of the plant stack is transferred to the NGM203SX (B6304HR_A).
L2021110Attachment1 Page7of14
TP3 DATA POINT LIBRARY REFERENCE FILE Date:
Reactor Unit:
TP3 Data Feeder:
N/A NRC ERDS Parameter:
EFF GAS RAD Point ID:
B6304HR_A Plant Spec Point Desc:
Plant Vent Gas Gamma Hi Range B Generic/Cond Desc:
Radioactivity Of Released Gases Analog/Digital:
A Engr Units/Dig States:
uCi/cc Engr Units Conversion:
N/A Minimum Instr Range:
1.0E-4 Maximum Instr Range:
1.0E5 Zero Point
Reference:
N/A Reference Point Notes:
N/A PROC or SENS:
P Number of Sensors:
1 How Processed:
Data Link Sensor Locations:
Auxiliary Building Alarm/Trip Set Points:
Utilizes three setpoints: Alert, High, and High-High. Setpoint values are determined by Radiochemist NI Detector Power Supply Cut-off Power Level:
N/A NI Detector Power Supply Turn-On Power Level:
N/A Instrument Failure Mode:
As-Is Temperature Compensation For DP Transmitters N/A Level Reference Leg:
N/A Unique System Desc:
A Mirion NGM203SX unit provides the plant vent high range gas activity. The NGM203 detection subassembly utilizes a flow-through ionization chamber within a lead shield. The sensitivity of the detector is 1E-4 µCi/cc to 1E+5 µCi/cc. The plant vent stack is the normal discharge path for: Unit 3 & 4 containment purge, auxiliary building exhaust, Unit 3 & 4 Steam Jet Air Ejectors and Unit 4 SFP. Note: Unit 3 SFP exhaust is through a dedicated stack.
L2021110Attachment1 Page8of14
TP3 DATA POINT LIBRARY REFERENCE FILE Date:
Reactor Unit:
TP3 Data Feeder:
N/A NRC ERDS Parameter:
NL Point ID:
B6304FLO_A Plant Spec Point Desc:
Plant Vent Flow Rate B Generic/Cond Desc:
Plant Vent Stack Flow Rate Analog/Digital:
A Engr Units/Dig States:
cfm Engr Units Conversion:
N/A Minimum Instr Range:
0 Maximum Instr Range:
1.5E+5 Zero Point
Reference:
N/A Reference Point Notes:
N/A PROC or SENS:
P Number of Sensors:
1 How Processed:
Data Link Sensor Locations:
Plant Vent Stack Near Top Alarm/Trip Set Points:
N/A NI Detector Power Supply Cut-off Power Level:
N/A NI Detector Power Supply Turn-On Power Level:
N/A Instrument Failure Mode:
As-Is Temperature Compensation For DP Transmitters N/A Level Reference Leg:
N/A Unique System Desc:
Plant vent flow is provided by transmitters FT-6584A and FT-6584B which independently measure the differential pressure across a single flow orifice installed in the plant vent stack. The signals are transmitted to the plant DCS where based on operator selection, the signal from FT-6584A or FT-6584B is then routed back to the NGM216S and NMG203S radiation monitors. The selected signal is then used by the NGM216S and NMG203S monitors to establish the monitors target sample flow rates.
L2021110Attachment1 Page9of14
PTN4ERDSDataPointLibraryChanges:
TP4 DATA POINT LIBRARY REFERENCE FILE Date:
Reactor Unit:
TP4 Data Feeder:
N/A NRC ERDS Parameter:
EFF GAS RAD Point ID:
P6304LR_A Plant Spec Point Desc:
Plant Vent Gas Activity Low Range A Generic/Cond Desc:
Radioactivity Of A Released Gas Analog/Digital:
A Engr Units/Dig States:
µCi/cc Engr Units Conversion:
N/A Minimum Instr Range:
1E-7 Maximum Instr Range:
1E-1 Zero Point
Reference:
N/A Reference Point Notes:
N/A PROC or SENS:
P Number of Sensors:
1 How Processed:
Data Link Sensor Locations:
Auxiliary Building Alarm/Trip Set Points:
Utilizes three setpoints: Alert, High, and High-High. Setpoint values are determined by Radiochemist NI Detector Power Supply Cut-off Power Level:
N/A NI Detector Power Supply Turn-On Power Level:
N/A Instrument Failure Mode:
As-is Temperature Compensation For DP Transmitters N/A Level Reference Leg:
N/A Unique System Desc:
A Mirion NGM216S unit provides the plant vent low range gas activity. The NGM216 is a beta scintillation detector with a 12µm thick titanium foil facing a 1000cc volume vessel in a protective lead shielding. The sensitivity of the detector is 1E-7 µCi/cc to 1E-1 µCi/cc. The Alert and High setpoints can be adjusted based on the release permit for the Gas Decay Tank. The gas tank discharge valve is automatically closed upon actuation of the High setpoint.
Upon reaching the High-High Alarm setpoint monitoring of the plant stack is transferred to the NGM203S (P6304HR_A).
L2021110Attachment1 Page10of14
TP4 DATA POINT LIBRARY REFERENCE FILE Date:
Reactor Unit:
TP4 Data Feeder:
N/A NRC ERDS Parameter:
EFF GAS RAD Point ID:
P6304HR_A Plant Spec Point Desc:
Plant Vent Gas Gamma Hi Range A Generic/Cond Desc:
Radioactivity Of Released Gases Analog/Digital:
A Engr Units/Dig States:
uCi/cc Engr Units Conversion:
N/A Minimum Instr Range:
1.0E-4 Maximum Instr Range:
1.0E5 Zero Point
Reference:
N/A Reference Point Notes:
N/A PROC or SENS:
P Number of Sensors:
1 How Processed:
Data Link Sensor Locations:
Auxiliary Building Alarm/Trip Set Points:
Utilizes three setpoints: Alert, High, and High-High. Setpoint values are determined by Radiochemist NI Detector Power Supply Cut-off Power Level:
N/A NI Detector Power Supply Turn-On Power Level:
N/A Instrument Failure Mode:
As-Is Temperature Compensation For DP Transmitters N/A Level Reference Leg:
N/A Unique System Desc:
A Mirion NGM203SX unit provides the plant vent high range gas activity. The NGM203 detection subassembly utilizes a flow-through ionization chamber within a lead shield. The sensitivity of the detector is 1E-4 µCi/cc to 1E+5 µCi/cc. The plant vent stack is the normal discharge path for: Unit 3 & 4 containment purge, auxiliary building exhaust, Unit 3 & 4 Steam Jet Air Ejectors and Unit 4 SFP. Note: Unit 3 SFP exhaust is through a dedicated stack.
L2021110Attachment1 Page11of14
TP4 DATA POINT LIBRARY REFERENCE FILE Date:
Reactor Unit:
TP4 Data Feeder:
N/A NRC ERDS Parameter:
NL Point ID:
P6304FLO_A Plant Spec Point Desc:
Plant Vent Flow Rate A Generic/Cond Desc:
Plant Vent Stack Flow Rate Analog/Digital:
A Engr Units/Dig States:
cfm Engr Units Conversion:
N/A Minimum Instr Range:
0 Maximum Instr Range:
1.5E+5 Zero Point
Reference:
N/A Reference Point Notes:
N/A PROC or SENS:
P Number of Sensors:
1 How Processed:
Data Link Sensor Locations:
Plant Vent Stack Near Top Alarm/Trip Set Points:
N/A NI Detector Power Supply Cut-off Power Level:
N/A NI Detector Power Supply Turn-On Power Level:
N/A Instrument Failure Mode:
As-Is Temperature Compensation For DP Transmitters N/A Level Reference Leg:
N/A Unique System Desc:
Plant vent flow is provided by transmitters FT-6584A (P6304FLO_A) and FT-6584B (B6304FLO_A) which independently measure the differential pressure across a single flow orifice installed in the plant vent stack. The signals are transmitted to the plant DCS where based on operator selection, the signal from FT-6584A or FT-6584B is then routed back to the NGM216S and NMG203S radiation monitors. The selected signal is then used by the NGM216S and NMG203S monitors to establish the monitors target sample flow rates.
L2021110Attachment1 Page12of14
TP4 DATA POINT LIBRARY REFERENCE FILE Date:
Reactor Unit:
TP4 Data Feeder:
N/A NRC ERDS Parameter:
EFF GAS RAD Point ID:
B6304LR_A Plant Spec Point Desc:
Plant Vent Gas Activity Low Range B Generic/Cond Desc:
Radioactivity Of A Released Gas Analog/Digital:
A Engr Units/Dig States:
µCi/cc Engr Units Conversion:
N/A Minimum Instr Range:
1E-7 Maximum Instr Range:
1E-1 Zero Point
Reference:
N/A Reference Point Notes:
N/A PROC or SENS:
P Number of Sensors:
1 How Processed:
Data Link Sensor Locations:
Auxiliary Building Alarm/Trip Set Points:
Utilizes three setpoints: Alert, High, and High-High. Setpoint values are determined by Radiochemist NI Detector Power Supply Cut-off Power Level:
N/A NI Detector Power Supply Turn-On Power Level:
N/A Instrument Failure Mode:
As-is Temperature Compensation For DP Transmitters N/A Level Reference Leg:
N/A Unique System Desc:
A Mirion NGM216S unit provides the plant vent low range gas activity. The NGM216 is a beta scintillation detector with a 12µm thick titanium foil facing a 1000cc volume vessel in a protective lead shielding. The sensitivity of the detector is 1E-7 µCi/cc to 1E-1 µCi/cc. The Alert and High setpoints can be adjusted based on the release permit for the Gas Decay Tank. The gas tank discharge valve is automatically closed upon actuation of the High setpoint.
Upon reaching the High-High Alarm setpoint monitoring of the plant stack is transferred to the NGM203S (B6304HR_A).
L2021110Attachment1 Page13of14
TP4 DATA POINT LIBRARY REFERENCE FILE Date:
Reactor Unit:
TP4 Data Feeder:
N/A NRC ERDS Parameter:
EFF GAS RAD Point ID:
B6304HR_A Plant Spec Point Desc:
Plant Vent Gas Gamma Hi Range B Generic/Cond Desc:
Radioactivity Of Released Gases Analog/Digital:
A Engr Units/Dig States:
uCi/cc Engr Units Conversion:
N/A Minimum Instr Range:
1.0E-4 Maximum Instr Range:
1.0E5 Zero Point
Reference:
N/A Reference Point Notes:
N/A PROC or SENS:
P Number of Sensors:
1 How Processed:
Data Link Sensor Locations:
Auxiliary Building Alarm/Trip Set Points:
Utilizes three setpoints: Alert, High, and High-High. Setpoint values are determined by Radiochemist NI Detector Power Supply Cut-off Power Level:
N/A NI Detector Power Supply Turn-On Power Level:
N/A Instrument Failure Mode:
As-Is Temperature Compensation For DP Transmitters N/A Level Reference Leg:
N/A Unique System Desc:
A Mirion NGM203SX unit provides the plant vent high range gas activity. The NGM203 detection subassembly utilizes a flow-through ionization chamber within a lead shield. The sensitivity of the detector is 1E-4 µCi/cc to 1E+5 µCi/cc. The plant vent stack is the normal discharge path for: Unit 3 & 4 containment purge, auxiliary building exhaust, Unit 3 & 4 Steam Jet Air Ejectors and Unit 4 SFP. Note: Unit 3 SFP exhaust is through a dedicated stack.
L2021110Attachment1 Page14of14
TP4 DATA POINT LIBRARY REFERENCE FILE Date:
Reactor Unit:
TP4 Data Feeder:
N/A NRC ERDS Parameter:
NL Point ID:
B6304FLO_A Plant Spec Point Desc:
Plant Vent Flow Rate B Generic/Cond Desc:
Plant Vent Stack Flow Rate Analog/Digital:
A Engr Units/Dig States:
cfm Engr Units Conversion:
N/A Minimum Instr Range:
0 Maximum Instr Range:
1.5E+5 Zero Point
Reference:
N/A Reference Point Notes:
N/A PROC or SENS:
P Number of Sensors:
1 How Processed:
Data Link Sensor Locations:
Plant Vent Stack Near Top Alarm/Trip Set Points:
N/A NI Detector Power Supply Cut-off Power Level:
N/A NI Detector Power Supply Turn-On Power Level:
N/A Instrument Failure Mode:
As-Is Temperature Compensation For DP Transmitters N/A Level Reference Leg:
N/A Unique System Desc:
Plant vent flow is provided by transmitters FT-6584A (P6304FLO_A) and FT-6584B (B6304FLO_A) which independently measure the differential pressure across a single flow orifice installed in the plant vent stack. The signals are transmitted to the plant DCS where based on operator selection, the signal from FT-6584A or FT-6584B is then routed back to the NGM216S and NMG203S radiation monitors. The selected signal is then used by the NGM216S and NMG203S monitors to establish the monitors target sample flow rates.