ML071060085
| ML071060085 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 04/10/2007 |
| From: | Schinner E Constellation Energy Group |
| To: | Document Control Desk, Office of Nuclear Security and Incident Response |
| References | |
| Download: ML071060085 (4) | |
Text
Calvert Cliffs Nuclear Power Plant Constellation Generation Group, LLC 1650 Calvert Cliffs Parkway Lusby, Maryland 20657 0
Constellation Energy April 10, 2007 U. S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION:
SUBJECT:
Document Control Desk Calvert Cliffs Nuclear Power Plant Unit No. 2; Docket No. 50-318 Emergency Response Data System The attached revision to the Emergency Response Data System (ERDS) Data Point Library for the Calvert Cliffs Nuclear Power Plant is provided pursuant to 10 CFR Part 50, Appendix E, Section VI.3.a.
The table below provides a brief summary of the changes:
Previous Sensor New Sensor Point Identifier Unit Description Location Location SP2112 2
Reactor Vessel Level 185 inches 160 inches SP2112 2
Reactor Vessel Level 153 inches 151 inches The "before" and "after" ERDS Data Point Library sheets are attached.
Should you have questions regarding this matter, please contact Mr. Jay S. Gaines at (410) 495-5219.
Very truly yours, Edward N. Schinner Director - Emergency Planning ENS/CAN/bjd
Attachment:
Emergency Response Data System Data Point Library (2 pages) cc:
D. V. Pickett, NRC S. J. Collins, NRC Resident Inspector, NRC R. I. McLean, DNR J. R. Jolicoeur, NRC 402-(
ATTACHMENT (1)
EMERGENCY RESPONSE DATA SYSTEM DATA POINT LIBRARY Calvert Cliffs Nuclear Power Plant, Inc.
April 10, 2007
PWR Data Point Library Reference File Report Date:
06-08-2006 Page :
2 Date:
Reactor Unit:
Data Feeder:
NRC ERDS Parameter:
Point ID:
Plant Specific Point
Description:
Generic I Condition
Description:
Analog I Digital:
ENGR Units I Digital States:
ENGR Units Conversion:
Minimum Instrument Range:
Maximum Instrument Range:
Zero Point
Reference:
Reference Point Notes Proc or Sens:
Number of Sensors:
How Processed:
Sensor Locations Alarm / Trip Setpolnts:
NI Detector Power Supply Cut-Off Power Level:
NI Detector Power Supply Turn-on Power Level:
Instrument Failure Mode:
Temperature Compensation for DP Transmitters:
Level Reference Leg:
Unique System
Description:
1114/1992 CC2 CC21 REC VES LEV SP2112 REACTOR VESSEL LEVEL REACTOR VESSEL WATER LEVEL A
INCHES N/A N/A N/A FAP N/A P
32 RE:USD (REFERENCE UINQ SYS DESC) 185,153,112,71,50,29,19, & 10" ABOVE FAP VOID DETECTED N/A N/A N/A N
N/A 8 HEATED JUNCTION THERMOCOUPLES (HJTC) ARE SPACED STRATEGICALLY IN A VACANT CEA SHROUD ASSEMBLY NEAR THE VICINITY OF ONE HOT LEG OUTLET NOZZLE. AS HJTC IS UNCOVERED THE LVL THAT THE REACTOR HEAD IS UNCOVERED IS INDICATED IN INCREMENTAL STEPS. THE 1ST HJTC IS 185" FROM TOP OF FUEL ALIGNMENT PLATE(FAP); 8TH HJTC IS 10 FROM FAP: 5TH HJTC IS 50" FROM FAP WHICH IS THE CENTER LINE OF THE HOT LEGS. HOW PROCESSED: WHEN LVL DECREASES A VOID IN THE HJTC WILL PROVIDE AN OUTPUT SIGNAL FOR THAT SPECIFIC HJTC POSITION.
PWR Data Point Library Reference File Report Date:
Page:
03-13-2007 2
Date:
Reactor Unit:
Data Feeder:
NRC ERDS Parameter:
Point ID:
Plant Specific Point
Description:
Generic / Condition
Description:
Analog I Digital:
ENGR Units / Digital States:
ENGR Units Conversion:
Minimum Instrument Range:
Maximum Instrument Range:
Zero Point
Reference:
Reference Point Notes Proc or Sens:
Number of Sensors:
How Processed:
Sensor Locations Alarm / Trip Setpoints:
NI Detector Power Supply Cut-Off Power Level:
NI Detector Power Supply Turn-on Power Level:
Instrument Failure Mode:
Temperature Compensation for DP Transmitters:
Level Reference Leg:
Unique System
Description:
3/12/2007 CC2 CC21 REC VES LEV SP2112 REACTOR VESSEL LEVEL REACTOR VESSEL WATER LEVEL A
INCHES N/A N/A N/A FAP N/A P
32 RE:USD (REFERENCE UNIQUE SYS DESC) 160,151,112,71,50,29,19, & 10" ABOVE FAP VOID DETECTED N/A N/A N/A N
N/A 8 HEATED JUNCTION THERMOCOUPLES (HJTC) ARE SPACED STRATEGICALLY IN A VACANT CEA SHROUD ASSEMBLY NEAR THE VICINITY OF ONE HOT LEG OUTLET NOZZLE. AS HJTC IS UNCOVERED THE LVL THAT THE REACTOR HEAD IS UNCOVERED IS INDICATED IN INCREMENTAL STEPS. THE 1ST HJTC IS 160" FROM TOP OF FUEL ALIGNMENT PLATE(FAP); 8TH HJTC IS 10" FROM FAP; 5TH HJTC IS 50" FROM FAP WHICH IS THE CENTER LINE OF THE HOT LEGS. HOW PROCESSED: WHEN LVL DECREASES A VOID IN THE HJTC WILL PROVIDE AN OUTPUT SIGNAL FOR THAT SPECIFIC HJTC POSITION.