L-2007-171, Emergency Response Data System (ERDS) Maintenance

Emergency Response Data System (ERDS) Maintenance

ML073180461
Person / Time
Site:	Turkey Point
Issue date:	10/07/2007
From:	Jefferson W Florida Power & Light Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
L-2007-171
Download: ML073180461 (2)

Text

FPIL*

S OCT 72WS L-2007-171 10CFR50, Appendix E US Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC, 20555-0001 Re: Turkey Point Unit 4 Docket No. 50-251 Emergency Response Data System (ERDS) Maintenance This letter is being submitted pursuant to 10CFR50, Appendix E, VI, 3.b (Maintaining the Emergency Response Data System) for Turkey Point Unit 4 due to an ERDS Point ID revision.

The Turkey Point Unit 4 (TP4) ERDS Data Point Library (DPL) needs to be modified so that the ERDS "send program" sends SCMCETLO-4 instead of SMM1LO-4 for Reactor Coolant System (RCS) subcooling margin. Turkey Point's original submittal for ERDS compliance in July, 1992, as well as FPL letter L-2007-129 dated October 11, 2007, sent the wrong data point. Since installation of ERDS in 1992, the subcooled margin data point provided was based on RCS highest temperatures rather than the highest Core Exit Thermocouple as required by NUREG-1394, Revision 1, "Emergency Response Data System (ERDS) Implementation." This letter provides an updated replacement page for Attachment 4 to FPL letter L-2007-129, page 9 of 59. The Data Point ID has been changed on the replacement page from SMM1LO-4 to SCMCETLO-4. This Data Point ID change will affect the ERDS transmission format and computer communication protocol, therefore NRC notification is required 30 days prior to implementation. This will require ERDS DPL point ID updates for TP4 by NRC personnel.

This change will be overseen by vendor personnel from Scientech LLC. The vendor will coordinate the Point ID change-over between TP4 and the NRC Operations Center to minimize ERDS unavailability during this time.

This information is being provided for both compliance to 10CFR50, Appendix E, VI, 3.b requirements and to support implementation by the NRC of the new TP4 ERDS Data Point ID.

,Should there be any questions, please contact Paul Infanger at 305-246-6632.

your, truly ZVer Turkey Point Nuclear Plant Attachment cc: Regional Administrator, Region II, USNRC Senior Resident Inspector, USNRC, Turkey Point Plant an FPL Group company

• K4

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L-2007-171 Attachment 1 Revised Page 9 of 59 of Attachment 4 of L-2007-129 TP4 DATA POINT LIBRARY REFERENCE FILE Date: 08/07/2007 Reactor Unit: TP4 Data Feeder: N/A NRC ERDS Parameter: Sub Margin Point ID: SCMCETLO-4 Plant Spec Point Desc: Subcooling Generic/Cond Desc: Sat Temp - Highest CET Analog/Digital: A Engr Units/Dig States: OF Engr Units Conversion: N/A Minimum Instr Range: - 2100 Maximum Instr Range: 700 Zero Point

Reference:

N/A Reference Point Notes: N/A PROC or SENS: P Number of Sensors: 2 How Processed: 2 Input Low Select Sensor Locations: Core Exit Channels Alarm/Trip Set Points: N/A NI Detector Power Supply N/A Cut-off Power Level:

NI Detector Power Supply N/A Turn-On Power Level:

Instrument Failure Mode: As-Is Temperature Compensation N/A For DP Transmitters Level Reference Leg: N/A Unique System Desc: Signals originate from 2 QSPDS (Qualified Safety Parameter Display System) Channel Trains selecting the lower of 2 calculated subcooled margins. The QSPDS subcooled margin calculation for each Train uses a representative CET temperature input (based on statistical analyses) as measured against saturation temperature for existing RCS pressure.