ML20040F523
| ML20040F523 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 01/29/1982 |
| From: | Bordine T CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| NUDOCS 8202090296 | |
| Download: ML20040F523 (4) | |
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James G Keppler, Administrator p
Region III US Nuclear Regulatory Commission RECSVED 9
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Glen Ellyn, IL 60137 FEB 81982r-
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NRC Region III Confirmation of Action letter dated December 14, 1981 docu-mented agreements between Consumers Power Company and the Nuclear Regulatory Commission on December 9, 1981 during the management exit interview following the NRC Emergency Preparedness Appraisal at Big Rock Point Plant. Specifi-cally, Item 2 of the letter identifies the following commitments for Meteorology:
,a.
A back-up meteorological system will be installed, consisting of wind direction and wind speed sensors mounted on the stack at the level of the isokinetic probe, and read out in the control room.
This will be completed by May 15, 1982, contingent on procurement.
b.
A description of the above system will be submitted for hTC review by February 1, 1982.
Preliminary design review identified that the stack diameter at the isokinetic probe level is too large and will prohibit proper functioning of the instru-ments. The sensors will therefore be located at the 71 meter level (level of the top work platform). This level will provide more accurate meteorological information due to the smaller diameter of the stack and hence the stack will have a lesser influence on the sensors.
Dr Carl Paperiello, by telephone conversation on January 11, 1982, was noti-fied of our intent to change the installation location of the meteorological information readout from the Control Room to the Technical Support Center (TSC).
It is the intent of this letter to provide the basis for the location oc0182-0019bl42 hilll 1
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Jrmes G Krppler, Administrator 2
Big Rock Point Plant Emer Preparedness Appraisal January 29, 1982 change, a summary of the meteorological capabilities available to the Big Rock Point Plant and a description of the back-up meteorological system.
Our decision to place the recorders in the TSC is based on the need for TSC personnel to utilize and interpret the meteorological data provided by the recorders. The meteorological instruments provide information to the Site Emergency Director for the determination of protective actions for each sector, and provide information to the Plant Health Physicist for the deter-mination of offsite doses. Since the meteorological instruments provide no release path isolation function or alarm, locating these readouts in the Control Room is not necessary.
In addition, panel space in the Control Room is not sufficient for the recorders. Major changes in the panel would be required to locate these readouts in the Control Room. However, the proposed location for the instrument readouts in the TSC will be visible to the operators in the Control Room through the glass window in the wall which separates the two areas.
Meteorological capabilities for the Big Rock point Plant are described by our letters of March 31, 1981, July 9, 1981 and December 18, 1981, in response to NUREG-0737, Item III.A.2, Improving Licensing Preparedness - Long Term.
Consumers Power Company will use National Weather Service data supplied by Weather Services International via modem-linked printer instead of installing primary meteorological capabilities as described by NUREG-0654 and Regulatory Guide 1.23.
In addition, warning sirens will be installed to provide immedi-ate warning of the public within the 5 mile EPZ. Supplemental meteorological capabilities include current windspeed and direction information provided by the Coast Guard, National Weather Service forecasters, and the Mt McSauba weather station.
A description of the back-up meteorological system is provided as Attachment 1.
Our meteorological system provides information to determine the necessity for notification, sheltering, evacuation, for making confirmatory radiological measurements, and to identify the areas of contaminated property and foodstuff requiring protective measures.
It is Consumers Power Company's position that installation of this onsite backup system will close out the meteorology issue.
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w Thomas C Bordine Staff Licensing Engineeer CC Director, Office of Nuclear. Reactor Regulation Director, Office of Inspection and Enforcement NRC Resident Inspector-Big Rock Point pages oc0182-0019bl42 J
E=ergency Prepcredness Apprais 1 Meteorology (Item 2)
ATTACHMENT 1 1.
SYSTEM DESCRIPTION Consumers Power Company (CP Co) 1.lans to install an on-site backup meteorological monitoring system at the Big Rock Point Plant. This system will provide measurements of wind speed, wind direction and sigma theta (standard deviation of the horizontal wind direction). The wind measurements will be taken on the plant's 73 meter stack at approximately the 71 meter level (level of the top work platform). A propvane will be mounted on a boom oriented to the west approximately 10 feet out from the stack; the stack diameter at this level is approximately 5 feet. This orientation will provide meteorological data for on-shore wind flow. The meteorological data will be displayed in the plant Technical Support Center.
2.0 SYSTEM EQUIPMENT Table 1.1 provides a description and specification statement for the anticipated meteorological equipment. The exact meteorological equipment has not been formally selected. All of the signal processing and recording equipment will be mounted in a standard equipment rack (40-3/4" x 24-3/16" x 27-3/8").
3.0 MAINTENANCE AND CALIBRATIONS Plant personnel will provide the routine system checks and maintenance on a weekly basis. Approximately every two weeks a meteorological technician from the CP Co Environmental Department will provide a complete system inspection. All non-routine maintenance and repair and quarterly calibrations will be provided by the Environmental Department.
4.0 DATA DISPLAY A continuous record of wind speed and wind direction will be displayed on an analog strip chart. This strip chart will provide a direct read-out of the propvane output. A continuous record of running average sigma theta values will be provided on an analog strip chart. A micro-computer based sigma theta module will be used to calculate values for sigma theta. This module will sample wind direction values at I second inte rvals. The interval over which the running sigma value will be computed is 15 minutes.
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E METEOROLOGICAL SYSTEM COMPONENTS 2
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ITEM MANUFACTURER MODEL NUMBER APPLICABLE PARAhETER ACCURACY Wind Sensor / Translator **
R M Young Co 8002CX/23h01 Wind Direction f; 3 Degrees Wind Speed 4; 0.5 mph Sigma Theta Module Climatronics, Corp P/N 101035 Signa Theta 1 part in 256 (reported resolution)
Wind Recorder Esterline Angus L11S2S-MVT21-Wind Direction
+ 1.89 degrees MV T21-E0020 Wind Speed
[0.35 mph RD-L1-U-Y Sigma Theta
+;0.35 degrees
- Wind speed working range.89 mph to 121 mph Wind speed threshold.89 Damping ration.3h with a deflection of 20 degrees Distance constant of 2.4 meters Wind direction range 0-540 degrees N
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