ML20207J457
| ML20207J457 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 12/19/1986 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20207J450 | List: |
| References | |
| NUDOCS 8701080465 | |
| Download: ML20207J457 (3) | |
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UNITED STATES 8'
'n NUCLEAR REGULATORY COMMISSION y
WASHINGTON. D. C. 20555
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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMENDMENT HOS.125 AND 106 TO FACILITY OPERATING LICENSE NOS. DPR-53 AND DPR-69 BALTIMORE GAS AND ELECTRIC COMPANY CALVERT CLIFFS NUCLEAR POWER PLANT, UNIT NOS. 1 AND 2 DOCKET NOS. 50-317 AND 50-318 INTRODUCTION By the application for license amendments dated July 31, 1986, as supplemented by the November 5, 1986 submittal, the Baltimore Gas & Electric Company (BG&E) requested changes to the Technical Specifications (TS) for Calvert Cliffs, Units 1 and 2.
The TS changes proposed are as follows:
- 1) Modify TS Surveillance Requirement 4.4.10.1.1 for Unit 1 (Unit 2) by adding the note:
" Reactor coolant pump flywheel inspections for the first inservice inspection interval may be completed by June 1990 (June 1991) in conjunction with the reactor coolant pump motor overhaul program."
This note was paraphrased from the original BG&E amendment request for the purpose of clarification.
These changes were made with the consent of the BG&E staff.
- 2) Modify TS 3/4.7.8, " Snubbers," by deleting Table 3.7-4, " Safety Related Hydraulic Snubbers," and by changing the TS Limiting Condition for i
Operation (LCO) 3.7.8.1 to state:
"All safety related snubbers shall be operable", and all other references to " snubbers listed in Table 3.7-4 shall be appropriately changed to
" safety related snubbers" to meet the guidelines of LCO 3.7.8.1.
InadditionthefollowingnoteshallbeaddedtoTSLCO3.h.8.1:
" Safety related snubbers include those snubbers installed on safety related systems and snubbers on non-safety related systems if their failure or the failure of the system on which they are installed would have an adverse effect on any safety related system."
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' i DISCUSSION AND EVALUATION Units 1 and 2 TS Surveillance Requirement 4.4.10.1.1 requires RCP ' flywheel inspections to be conducted per the recommendations of Regulatory Position C.4.b of Regulatory Guide 1.14, Revision 1, dated August 1975.
Regulatory Position C.4.b.(2) states that a surface examination of all exposed surfaces and complete ultrasonic volumetric examination of the RCP flywheels shall be performed at approximately 10 year intervals during the plant shutdown coinciding with the inservice inspection schedule,as required by Section XI of the ASME Code.
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In Change No. l'; t'he licensee has proposed that this requireigent be modified to link the performance of the RCP flywheel inspections to the licensee's f
voluntary RCP motor overhaul program rather than to the ISI interval.
This o
proposed modification would only affect RCP flywheel inspections applicable to the first 10 year ISI interval.
All following flywheel inspections would continue to be linked to their respective ISI interval schedules.
Three years ago the licensee initiated a voluntary RCP motor overhaul program utilizing a spare motor to enable quick motor changcout.
During each refueling outage one motor will be changed until all eight RCP motors are i
overhauled, at which time the voluntary program will be completed.
The licensee intends to perform the required flywheel examinations coincident with the motor overhaul schedule.
To date, two RCP flywheels have been inspected with acceptable results.
As a consequence of linking the RCP flywheel inspection to the RCP motor overhaul program, four of the eight RCP flywheels will have had their inspections completed at the end of the first 10 year ISI interval.
l The first 10 year ISI intervals for both Units 1 and 2 are scheduled for completion in April 1987.
This proposed change would result in the completion of the RCP flywheel inspections being deferred to June 1990, and June 1991 for Units 1 and 2, respectively, due to being linked to the completion of the RCP motor overhaul program.
Though this proposal would significantly lengthen the period of time necessary to complete the RCP flywheel inspections, the technical superiority of the visual flywheel inspection conducted in conjunction with the RCP motor changeout in comparison to the difficulty in adequately performing the conventional in place ultrasonic examination of the two piece bolted flywheel design more than compensates for the increase in inspection time.
Accordingly, the proposed change to TS 4.4.10.1.1 is deemed acceptable in that, though the period of time over which the inspection is performed is lengthened, the inspection results provided are better than for a conventional in place ultrasonic examination.
The Change No. 2 proposal to delete Table 3.7-4, " Safety Related Hydraulic Snubbers," from the Units 1 and 2 TS 3/4.7.8, " Snubbers," and replace the phrase " snubbers listed in Table 3.7-4" with " safety-related snubbers" is an administrative change that is in accordance with the Commission guidelines presented in Generic Letter (GL) 84-13, " Technical Specifications for Snubbers."
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GL 84-13 states that the Comission has reassessed the inclusion of. snubber listings within the TS and has concluded that such listings are unnecessary provided the snubber TS are modified to specify which snubbers are required to be operable. The snubbers that were recommended for required operability by GL 84-13 included all snubbers with the exception of those snubbers installed on non-safety related systems whose failure or. failure of the system on which they are installed would have no adverse effect on any safety related systems. The licensee's proposal that only safety related snubbers shall be operable complies with the guidance of GL 84-13 as the licensee's definition of safety related snubbers in the LCO includes all snubbers as specified by GL 84-13, and also' includes all snubbers currently listed in Table 3.7-4.
This change is administrative in nature. Therefore, the propored change to TS 3/4.7.8 to delete Table 3.7-4 is acceptable. Though the snubber table is being deleted, all of the snubbers that are currently required to be operable will still be required to be demonstrated operable in the proposed requirement.
ENVIRONMENTAL CONSIDERATION These 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 amendments involve no significant increase in the amounts, and no significan; 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 published a proposed finding that these amendments involve no significant hazards consideration and there has been no public coment on such finding. Accordingly, these amendments meet the eli categorical exclusion set forth in 10 CFR 551.22(c)(gibility criteria for 9). These amendments also involve changes in recordkeeping, reporting or administrative procedures 1
or requirements. Accordingly, with respect to these items, the amendments meet the elioibility criteria for categorical exclusion set forth in 10 CFR 951.22(c)(10). Pursuant to 10 CFR 651.22(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 Comission's regulations, and 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: December 19, 1986 Principal Contributors: Martin Hum and Scott McNeil i
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