ML071060085

Emergency Response Data System

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 1650 Calvert Cliffs Parkway Constellation Generation Group, LLC Lusby, Maryland 20657 0 Constellation Energy April 10, 2007 U. S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION: Document Control Desk

SUBJECT:

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 R. I. McLean, DNR S. J. Collins, NRC J. R. Jolicoeur, NRC Resident Inspector, 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: 1114/1992 Reactor Unit: CC2 Data Feeder: CC21 NRC ERDS Parameter: REC VES LEV Point ID: SP2112 Plant Specific Point

Description:

REACTOR VESSEL LEVEL Generic I Condition

Description:

REACTOR VESSEL WATER LEVEL Analog I Digital: A ENGR Units I Digital States: INCHES ENGR Units Conversion: N/A Minimum Instrument Range: N/A Maximum Instrument Range: N/A Zero Point

Reference:

FAP Reference Point Notes N/A Proc or Sens: P Number of Sensors: 32 How Processed: RE:USD (REFERENCE UINQ SYS DESC)

Sensor Locations 185,153,112,71,50,29,19, & 10" ABOVE FAP Alarm / Trip Setpolnts: VOID DETECTED NI Detector Power Supply Cut-Off Power Level: N/A NI Detector Power Supply Turn-on Power Level: N/A Instrument Failure Mode: N/A Temperature Compensation for DP Transmitters: N Level Reference Leg: N/A Unique System

Description:

8 HEATED JUNCTION THERMOCOUPLES (HJTC) ARE SPACED STRATEGICALLY IN AVACANT 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: 03-13-2007 Page: 2 Date: 3/12/2007 Reactor Unit: CC2 Data Feeder: CC21 NRC ERDS Parameter: REC VES LEV Point ID: SP2112 Plant Specific Point

Description:

REACTOR VESSEL LEVEL Generic / Condition

Description:

REACTOR VESSEL WATER LEVEL Analog I Digital: A ENGR Units / Digital States: INCHES ENGR Units Conversion: N/A Minimum Instrument Range: N/A Maximum Instrument Range: N/A Zero Point

Reference:

FAP Reference Point Notes N/A Proc or Sens: P Number of Sensors: 32 How Processed: RE:USD (REFERENCE UNIQUE SYS DESC)

Sensor Locations 160,151,112,71,50,29,19, & 10" ABOVE FAP Alarm / Trip Setpoints: VOID DETECTED NI Detector Power Supply Cut-Off Power Level: N/A NI Detector Power Supply Turn-on Power Level: N/A Instrument Failure Mode: N/A Temperature Compensation for DP Transmitters: N Level Reference Leg: N/A Unique System

Description:

8 HEATED JUNCTION THERMOCOUPLES (HJTC) ARE SPACED STRATEGICALLY INA 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 INTHE HJTC WILL PROVIDE AN OUTPUT SIGNAL FOR THAT SPECIFIC HJTC POSITION.