ML17321A541
| ML17321A541 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 04/01/1985 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML17321A540 | List: |
| References | |
| NUDOCS 8504150624 | |
| Download: ML17321A541 (6) | |
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UNITED STATES t
NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION REI.ATED TO AMENDMENT NO.
83 TO FACILITY OPERATING LICENSE NO.
DPR-58 AND AMENDMENT NO.
TO FACILITY OPERATING LICENSE NQ.
DPR-74 INDIANA AND MICHIGAN ELECTIC COMPANY DONALD C.
COOK NUCLEAR PLANT UNIT NOS.
1 AND 2 DOCKET NOS.
50-315 AND 50-316 INTRODUCTION
~ ~ : By letter dated December 28,
Cook Units 1 and 2 Technical Specifications.
The proposed amendment revises the Technical Specifications (T/S) to make the Unit 1 and 2 Ice Condenser T/S identical and make both consistent with the Westinghouse Standard Specifications (STS),
NUREG-0452, Rev. 4.
EVALUATIONS The following changes proposed by the licensee are primarily of an admin-istrative nature, make the Unit 1 and Unit 2 T/S identical, and do not adversely affect the safety of the plant or the general public.
The staff finds these changes to be acceptable.
Pro osed Chan e to Unit 1 and Unit 2 T/S 3.6.5.1;a DESCRIPTION OF CHANGE Specification 3.6-.5.l.a is rewritten to read as follows:
"The stored ice having a boron concentration of at least 1800 ppm (the boron being in the form of sodium tetraborate),
and a
pH of 9.0 to 9.5 at 25'."
This change specifies a temperatureat which the pH is measured and eliminates possible confusion by specifying boron concentration instead of sodium borate.
EVALUATION This change is primarily administrative in nature and has no effect on safety.
The new specification is more restrictive than existing T/S, and is very similar to the Westinghouse STS.
Pro osed Chan e to Unit 1 T/S 4.6.5. l.b DESCRIPTION OF CHANGE Specification 4.6.5.l.b is rewritten to shorten the surveillance interval from 12 months to 9 months.
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EVALUATION This change is conservative, makes Unit 1 T/S identical to Unit 2's and is identical to the Westinghouse STS.
This change has no effect on safety.
Pro osed Chan e to Unit 1 and Unit 2 T/S 4.6.5. l.b. 1 DESCRIPTION OF CHANGE Specification 4;-6.5.l.b.l is rewritten to read as follows:
"Chemical analyses which verify that at least 9 representative samples of stored ice have a boron concentration of at least 1800 ppm (the boron being in the form of sodium tetraborate),
and a
pH of 9.0 to 9.5 at 25'."
This change specifies a
temperature at which the pH is measured and eliminates possible confusion by specifying boron concentration instead of sodium borate.
EVALUATION This change is primarily administrative in nature and has no effect on safety.
The new specification is more restrictive than existing T/S and is very similar to the Westinghouse STS.
Pro osed Chan e to Unit 1 T/S 4.6.5. l.b.2 DESCRIPTION OF CHANGE
'his change proposes that the ice condenser be subdivided into three groups of baskets as follows:
"Group 1 - bays 1 through 8, Group 2 - bays 9 through 16, and Group 3 - bays 17 through 24," instead of "Group 1 - bays 1 through 7, Group 2 - bays 8 through 14, and Group 3 - bays 15 through 24."
EVALUATION The original T/S had been changed from the STS and was evaluated in the D.C.
Cook Safety Evaluation Report, Supplement 5 dated January 1976.
This initial change was due to the initial ice loadings which created discrepancies in basket weights.
Subsequent ice replenishments have eliminated these discrepan-cies.
This change is acceptable since the Unit 1 T/S will now be closer to
'he.Westinghouse
- STS, and will not affect public health and safety.
I Pro osed Chan e to Unit 1 T/S 3.6.
5.2 DESCRIPTION
OF CHANGE Specification 3.6.5.2 Action statement a.3.c was changed to read "3 OPERABLE refrigerant units" instead of "3 OPERABLE 25 ton refrigeration chillers."
EVALUATION This change is primarily administrative in nature as each unit is rated at 25 tons.
This change is acceptable as this will make Unit 1 and Unit 2's T/S identical with the Westinghouse STS.
Pro osed Chan e to Unit 1 T/S 4.6.5.
3.1 DESCRIPTION
OF CHANGE The licensee proposes that the operability of the ice condenser inlet doors be demonstrated at least once per 9 months by torque testing 50K of the doors instead of at least once per 6 months with 25K of the doors being torque tested.
EVALUATION This change is acceptable as this would be more conservative than before and this will make Unit 1 and Unit 2 T/S identical.
Pro osed Chan es to Unit 1 T/S Pa es 3/4 30 to 6-32 DESCRIPTION OF CHANGES The licensee proposes:
1.
That the following words be removed from T/S's 4.6.5.3.1(b) and 4.6.5.3.2(b):
"at least once per 3 months during the first year after the ice bed is fully loaded" and "thereafter."
2.
Technical Specification 4.6.5.3.2(a) be clarified to read "that opening of each door is not impaired by ice, frost, or debris" instead of "free of frost accumulation."
3.
Technical Specification 4.6.5.3.3 be revised to require the surveillance of the Top Deck Doors "once per 92 days" instead of "once per 3 months."
EVALUATION The first change is acceptable as it deletes obsolete requirements and makes Unit 1 T/S identical to Unit 2.
The second and third are acceptable as the changes are not of significance and they are identical to the Westinghouse STS.
Pro osed Chan e to Unit 1 and Unit 2 T/S 4.6.5.1.b.3 DESCRIPTION OF CHANGE Specification 4.6.5.l.b.3 is rewritten to read as follows:
"Verifying, by a visual inspection of at least two flow passages per ice con-denser bay, that the accumulation of frost or ice in flow passages between ice
- baskets, past lattice frames, through the intermediate and top deck floor grating, or past the lower inlet plenum support structures and turning vanes is restricted to a nominal thickness, of 3/8 inches.
If one flow passage per bay is found to have an accumulation of frost or ice greater than this thickness, a representative sample of 20 additional flow passages from the same bay shall be visually inspected."
Y
'V This change modifies the limiting ice thickness from 0.38 inches to a nominal 3/8 inches.
EVALUATION This change is acceptable because 3/8 inches is more conservative than
.38
- inches, and otherwise is identical to the Westinghouse STS.
ENV IRONMENTAL CONSIDERATION These amendments involve a change in the installation or use of the facilities'omponents located within the restricted areas as defined in 10 CFR 20.
The staff has determined that these amendments involve 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 these amendments involve no significant hazards consideration and there has been.no public comment on such finding.
Accordingly, these amendments meet the eligibility criteria for categorical exclusion set forth in 10 CFR Section 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 these amendments.
CONCLUSION We 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, and (2) such activities will be conducted in compliance with the Commission's regulations and the issuance of these amendments will not be inimical to the common defense and security or to the health and safety of the public.
Dated:
Apri'l 1, 1985 P RING IPAI CONTRIBUTORS'.
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