ML20079M888
| ML20079M888 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 10/22/1991 |
| From: | Hood D Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20079M891 | List: |
| References | |
| NPF-68-A-041, NPF-81-A-021 NUDOCS 9111080411 | |
| Download: ML20079M888 (2) | |
Text
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V PLANT SYSTEMS BASE 5 SNUBBERS (Continued)
Nuclear Regulatory Commissien (NRC) Generic Letter 90-09, " Alternative Requirements for Snubber Visual Inspection Intervals and Corrective Actions,"
dated December 11, 1990, provides an alternate method for determining the next interval for the visual inspection of snubbers from that to which the plant was originally licensed.
The orioinal schedule for snubber visual inspection was based only on the number of inoperable snubbers found during the previous visual inspection, irrespective of the size of the snubber population.
As a result, plants having a large numbe of snubbers found the original inspection schedule to be excessively restrict've.
Sionificantresources,includingsub.jecting plant personnel to unnec ary radiological exposure, were expended in order to com>ly with the visual it ection requirements.
The alternate schedule provided by 1RC Generic Letter 90-09 maintsias the same confidence level as that to which the plant was originally licensed and generally allows for the performance of visual inspections and any corrective actions during plant outages.
Incorporated herein as Table 4.7-2, " Snubber Visual Inspection Interval," the alternate inspection schedule is based upon the number of unacceptable snubbers found during the previous inspection in proportion to the size of various snubber populations or categories.
Snubbers may oe categorized, based upon their accenibility during power operation, as accessible or inaccessible.
The categories may be inspected separately or jointly.
However, categorization and inspection thereof must be made and documented prior to any inspection and that decision will constitute the basis for determining the next inspection interval for that category.
A snubber is considered unacceptable if it fails to satisfy the acceptance criteria for the visual inspection.
If review and evaluation can not justify continued operation with an unacceptable snubber, the snubber shall be declared inoperable and the applicable ACTION requirements shall be
- met, To determine the next inspection interval, the unacceptable snuboer may be reclassified as acceptable if it can be demonstrated that the snubber is operable :n its as-found condition by the performance of a functional test and if it satisfies the acceptance criteria for functional testing.
The next inspection interval may be twice, the same, or reduced to as much as two-thirds of the previous inspection interval and is contingent upon the number of unacceptable snubbers found in proportion to the population or category for each type of snubber included in the previous inspection.
While the original inspection schedule requirements established inspection intervals of 18 months (the length of a nominai fuel cycle) or a fraction thereof based on the number of inoperable snubbers of each type for the previous inspection period, the alternate method allows inspecti"; intervals to be compatible with a 24-month fuel cycle.
The ilterval may be increased to every other refueling outage for plants on a 24-month fuel cycle or up to 48 months for plants with other fuel cycles if few unacceptable snubbers are-found from the previous inspection.
Table 4.7-2 establishes limits for determining the next inspection interval and is consistent with the guidance provided in NRC Generic Letter 90-09.
911100041.1 911022 PDR ADDCK 05000366 p
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V0GTLE UNITS - 1 & 2 B 3/4 7-5 Amendment No. 41 (Unit 1)
Amendment No. 21(Unit S
P 9
Mr. W. G. Hairston, 111 Georgia Power Company Vogtle Electric Generating Plant cc:
Mr. J. A. Bailey fir. J. Leonard Ledbetter, Director Manager - Licensing Environmental Protection Division Georgia Power Company Department of Natural Resources P. O. Box 1295 205 Butler Street, EE., Suite 1252 Birmingham, Alabama 35201 Atlanta, Georgia 30334 11r. W. B. Shipman Attorney General General Manager, Yogtle Electric Law Department Generating Plant 132 Judicial Building P. O. Box 1600 Atlanta, Georgia 30334 Waynesboro, Georgia 30830 Mr. Alan R. Herdt Regional Administrator, Region 11 Project Branch #3 U.-S. Nuclear Regulatory Commissinn U. ".. Nuclear Regulatory Commission 101 Marietta Street, NW., Suite 2900 101 Marietta Street, NW., Suite 2900 Atlanta, Georgia 30323 Atlanta, Georgia 30323 Office of the County Commissioner Mr. Dan Smith-Burke County Commission Program Director of Waynesboro, Georgia 30830 Power Production Oglethorpe Power Corporation Office of Planning and Budget 2100 East Exchange Place Room 6158 P. O. Box 1349 270 Washington Street, SW.
Tucker, Georgia 30085-1349 Atlanta, Georgia 30334' Charles A. Patrizia, Esq.
Mr. C. K. ficCoy Paui, Hastings, Janofsky & Walker Vice President - Nuclear, Vogtle Project 12th-Floor Georgia Power Company 1050 Connecticut Avenue, NW.
P. O. Box 1295 Washington, DC 20036 Birmingham, Alabama 35201 Art Domby, Esquire Resident Inspector-Troutman, Sanders, Lockerman U. S. Nuclear Regulatory Commission
& Ashmore P. O. Box 572 127 Peachtree Street Waynesboro, Georgia 30830 Atlanta, Georgia 30301-1810 Mr. R. P. Mcdonald Executive Vice President -
Nuclear.0peratici,s Georgia Power Company P. O. Box 1295 Birmingham, Alabama 35201
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