ML17328A058
| ML17328A058 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 07/05/1989 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML17328A057 | List: |
| References | |
| NUDOCS 8907110435 | |
| Download: ML17328A058 (4) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMENDMENT N0.127 TO FACILITY OPERATING LICENSE NO.
DPR-58 AND AMENDMENT N0.113 TO FACILITY OPERATING LICENSE NO.
DPR-74 INDIANA MICHIGAN POWER COMPANY DONALD C.
COOK NUCLEAR PLANT UNITS NOS.
1 AND 2 DOCKETS NOS.
50-315 AND 50"316
- 1. 0 INTRODUCTION By letter dated March 4, 1988, the Indiana Michigan Power Company (the licensee) requested amendments to the Technical Specifications (TSs) appended to Facility Operating Licenses Nos.
DPR-58 and DPR-74 for the Donald C.
Cook Nuclear Plant, Units Nos.
1 and 2.
The proposed amendments would reflect the installation of a
new meteorological monitoring system and provide proper reference to meteorological tower locations and the locations of instrumentation used for determining temperature, wind speed and, wind direction.
The proposed changes would also modify the Bases for TS 3/4.3.3.4 to clarify channel check performance methodology as it applies to the new meteorological monitoring system.
- 2. 0 EVALUATION The new primary and backup meteorological towers are both located east of the plant facilities where the terrain is relatively flat, and a shoreline tower is located adjacent to the plant facilities and Lake Michigan.
Wind speed and direction will be measured on all three towers.
In addition, temperature and dew point will be measured on the primary and shoreline towers.
Precipitation measurements will be made at the primary tower.
The staff finds the location of the primary and backup towers suitable to provide data that is representative of the meteorological conditions in the Emergency Planning Zone.
The shoreline tower will provide data representing conditions of the unmodified marine air near the plant facilities.
The location of the new meteorological towers are included in the proposed TS changes in TS Figure 5. 1-3.
The proposed TS changes would modify the minimum channel operability requirements for wind speed and wind direction to be "Any 1/3 channels" for each parameter, and would eliminate the minimum channel operability requirements for air temperature measurement.
The purpose of the wind speed, wind direction, and air temperature measurements is to provide the necessary meteorological data to establish atmospheric stability categories to be used in estimating potential doses to the public as a result of routine or accidental releases of radioactivity to the atmosphere.
Stability categories can be established using either the difference in air temperature between two elevations (delta T) or the 3907110435 390705 PDR ADDCK 05000315 P
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standard deviation of the horizontal wind direction over some period of time (sigma theta).
The proposed elimination of channel operability requirements for air temperature is predicated on using sigma theta information to establish stability categories for off-site dose assessments if delta T information is not available (i.e., if one or both air temperature channels are inoperable).
The staff finds this approach to be acceptable, since the sigma theta values can be related directly to Pasquill stability categories and if the proposed TS channel operability requirements for wind direction are fulfilled, sigma theta information will be available at all times.
The relationship between Pasquill stability categor ies and sigma theta values is as follows:
Pas uill Stabilit Cate or A (extremely unstable)
B (moderately unstable)
C (slightly unstable)
D (neutral)
E (slightly stable)
F (moderately stable)
G (extremely stable)
Si ma Theta (De rees) 25.0 20.0 15.0 10.0 5.0 2.5 1.7 The proposed TS changes would also modify the Bases for TS 3/4.3.3.4, "Meteorological Instrumentation."
The proposed changes would add a clarification of the channel check requirements for the meteorological instrumentation.
The proposed clarification is extracted directly from the current TS definition 1.10, "Channel Check" and is, therefore, acceptable to the staff.
The remaining proposed TS changes provide the elevation of the wind speed, wind direction and air temperature instrumentation installed on the primary and backup meteorological towers and the locations of the new towers.
These proposed changes are intended solely to reflect the configuration of the as-installed meteorological monitoring system and are acceptable to the staff.
Based on the above evaluation, we find that the proposed changes to the TSs are acceptable.
- 3. 0 ENVIRONMENTAL CONSIDERATION The amendments involve a change in the installation or use of a facility component located within the restricted area as defined in 10 CFR Part 20.
The staff has determined that the amendment involves no significant increase in the
- amounts, and no significant change in the types, of any effluents that may be released offsite and that there is no significant increase in individual or cumulative occupational radiation exposure.
The Commission has previously issued a proposed finding that this amendment involves no significant hazards consideration and there has been no public comment on such finding.
Accordingly, the amendments meet the eligibility criteria for categorical exclusion set forth in 10 CFR 51.22(c)(9).
Pursuant to 10 CFR 51.22(b),
no environmental impact statement or environmental assessment need be prepared in connection with the issuance of this amendment.
- 4. 0 CONCLUSION Me have concluded, based on the considerations discussed above, that (1) there is reasonable assurance that the health and safety of the public will not be endangered by operation in the proposed
- manner, (2) such activities will be conducted in compliance with the Commission's regulations, and (3) the issuance of.the amendments will not be inimical to the common defense and security or to the health and safety of the public.
Date:
March 28, 1989 Principal Contributor:
Anthony T. Gody, Jr.
NRR/DRSP