NL-04-1469, Emergency Response Data System (ERDS) Data Point Library Modifications
| ML042430428 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 08/26/2004 |
| From: | Gasser J Southern Nuclear Operating Co |
| To: | Document Control Desk, Office of Nuclear Security and Incident Response |
| References | |
| NL-04-1469 | |
| Download: ML042430428 (3) | |
Text
Jeffrey T. Gasser Vice President Southern Nuclear Operating Company, Inc.
40 Inverness Center Parkway Post Office Box 1295 Birmingham, Alabama 35201 Tel 205.992.7721 Fax 205.992.0403 SOUTHERN A COMPANY Energy to Serve YourWorld '
NL-04-1469 August 26, 2004 Docket Nos.:
50-424 50425 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555-0001 Vogtle Electric Generating Plant Emergency Response Data System (ERDS)
Data Point Library Modifications Ladies and Gentlemen:
In accordance with the requirements of 10 CFR 50, Appendix E, Section VI, Item 3a, Southern Nuclear Operating Company is submitting changes to the Vogtle Electric Generating Plant Unit I and 2 Emergency Response Data System (ERDS) data point library. The changes were completed on July 27, 2004.
The data points T6174 (Primary MET Tower 60-10 Meter Delta Temperature) were revised to accommodate abnormal weather conditions that may occur.
If you have any questions, please advise.
Sincerely, ie e T.asser JTG/TDH
Enclosures:
Marked-up changes to the Unit I and 2 ERDS data point library.
cc:
Southern Nuclear Operating Companv Mr. J. B. Beasley, Jr., Executive Vice President Mr. W. F. Kitchens, General Manager - Plant Vogtle RType: CVC7000 U. S. Nuclear Regulatory Commission Dr. W. D. Travers, Regional Administrator Mr. C. Gratton, NRR Project Manager - Vogtle Mr. G. J. McCoy, Senior Resident Inspector - Vogtle
. 00
Chapter 13 - Emergency Response Data System (ERDS)
Date Reactor Unit Data Feeder NRC ERDS Parameter Point ID Plant Spec. Point Generic/Cond.
Analog/Digital Engr. Units/Dig Engr. Units Minimum Instr.
Maximum Instr.
Zero Point Reference Point Proc or Sens.
Number of Sensors How Processed Sensor Locations Alarm/Trip Setpolnts NI Power Cut Off NJ Power Turn On Instrument Failure Temp. Comp.
Level Reference
- 01/02/92
- VOl
- N/A
- STAB CLASS
- T6174
- PRIMARY MET TOWER 60-10 METER DELTA TEMP
- AIR STABILITY AT REACTOR SITE
- A DEGF
-&Z*o 20.0
-:04o 10 DEGF 20.o N/A
- NIA N/A
- S N/A
- N/A - THIS IS A DIRECT SENSOR INPUT
- PRIMARY MET TOWER
- NONE N/A N/A N/A N/A Unique System Uses the 60 meter and 10 meter temperature inputs to calculate a delta temperature at the primary meteorological monitoring station. 60-10 meter delta T provides an indication of atmospheric stability class (Pasquill Category) as Follows:
Pasquill Category A
B C
D E
F G
Stability Class Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable 60-10 M Delta T DEGF DT < -1.71
-1.71 < DT < -1.53
-1.53 < DT < -1.35
-1.35 < DT < -0.45
-0.45 <DT< +1.35
+1.35 < DT < -3.60
+3.60 < DT Appendix C Page 61
Chapter 13 - Emergency Response Data System (ERDS)
Date Reactor Unit Data Feeder NRC ERDS Parameter Point ID Plant Spec. Point Generic/Cond.
Analog/Digital Engr. Units/Dig Engr. Units Minimum Instr.
Maximum Instr.
Zero Point Reference Point Proc or Sens.
Number of Sensors How Processed Sensor Locations Alarm/Trip Setpoints NI Power Cut Off NI Power Turn On Instrument Failure Temp. Comp.
Level Reference
- 01/02/92
- V02
- N/A
- STAB CLASS
- T6174
- PRIMARY MET TOWER 60-10 METER DELTA TEMP
- AIR STABILITY AT REACTOR SITE
- A DEGF
_3.- t 2
- .* toDEGF N/A N/A
- N/A
- N/A NIA
- N N/A Unique System Uses the 60 meter and 10 meter temperature inputs to calculate a delta temperature at the primary meteorological monitoring station. 60-10 meter delta T provides an indication ofatmospheric stability class (Pasquill Category) as follows:
Pasquill Categoiy Stability Class A
Extrcmely Unstable B
Moderately Unstable C
Slightly Unstable D
Neutral E
Slightly Stable F
Moderately Stable G
Extremely Stable 60-10 M Delta T DEGF DT < -1.71
-1.71 < DT < -1.53
-1.53 < DT < -1.35
-1.35 c DT < -0.45
-0.45 < DT < +1.35
+1.35 < DT < +3.60
+3.60 < DT This input is obtained from the Unit I Integrated Plant Computer system via datalink.
Appendix C Page 122