ML18047A295
| ML18047A295 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 04/26/1982 |
| From: | Vandewalle D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | Crutchfield D Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8204280498 | |
| Download: ML18047A295 (3) | |
Text
consumers Power company General Offices: 1945 West Parnall Road, Jackson, Ml 49201 * (517) 788-1636 April 26, 1982 Dennis M Cru~chfield, Chief Operation Reactor Branch No 5 Nuclear Reactor Regulation US Nuclear Regulatory Commission Washington, DC 20555 DOCKET 50-255 -
LICENSE DPR PALISADES PLANT -
STEAM GENERATOR TUBE INSPECTION David J VandeWalle Nuclear Licensing Administrator The purpose of this letter is to document conclusions reached during recent discussions with you and members of the NRC staff regarding actions which Consumers Power Company plans to take prior to returning the Palisades Plant to service.
Palisades is currently in an unplanned outage which was necessitated by a primary to secondary leak of less than about 0.3 gpm.
Details of the nature of the leak have been discussed with the staff and will be provided in writing at a later date.
The conclusions reached during this meeting are as follows:
- 1.
Consumers Power Company will conduct additional eddy current testing of steam generator tubes with both the 540 SFW probe and the 4 x 4 probe in steam generator A only.
These additional tube inspections will be performed on a random sample basis such that the total number of tubes inspected, including those already inspected during this outage, eQuals 9% of the total number of unplugged tubes in steam generator A.
Inspections with the 540 SFW probe will include the straight portion of the hot leg and both the first and second U-bend of each tube selected.
With the 4 x 4 probe only the straight section of the hot leg will be inspected.
For the purpose of this \\,examination, a "defective" tube will be defined as a tube containing a defect similar to that found on the two tubes which have been identified as the leaking tubes.
The criteria used to determine whether or not to inspect additional tubes will be those found in Section 4.4.6.2 of NUREG-0212 "Standardized Technical Specification for Combustion Engineering Plants" (Revision 2 dated Fall 1980).
Decisions concerning the plugging or increased inspection due to excessive wastage will be determined by criteria presented in the Palisades Technical Specifications.
DMCrutchfield, Chief Palisades Plant Steam Generator Tube Inspections April 26, 1982
- 2.
Consumers Power Company commits to place an administrative limit on allowable primary to secondary leakage which is more restrictive than*that presently allowed by Technical Specification 3.1.5.d.
The new limit will permit leakage of no more than 0.1 gpm for any period of steady state operation greater than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> and will be imposed through a Standing Order to plant operations personnel.
A copy of the proposed Standing Order is enclosed.
- 3.
Following the current outage, all Licensed Operations personnel will be rebriefed in the proper response to steam generator tube leaks and tube ruptures prior to or while first serving on shift with the plant at or greater than hot standby.
If, following completion of the inspection program as described above, no additional defective tubes have been identified, Consumers Power Company at that time will commence efforts to return the Palisades Plant to service.
A report containing eddy current testing results and our conclusions regarding the nature of the two defects found in steam generator A will be supplied to the NRC within sixty days following startup of the plant.
CC Administrator, Region III, USNRC NRC Resident Inspector - Palisades 2
I~
- ~ F l
,,f' Tc Sus.iccT cc Duty and Call Supe:rinter~ts,. :falleades Shift Technical Advisors, Pall.es.des Shift S\\.tPCl'Visors, Pali&adt:s Control Room, Pal*Lsades Opera.tio~arintendent. Palisades April 22. 1982 PALISADES PLANT -
Pi.llWlY ?O SECONDARY LUX EM! CRITERIA I'OR 'ROOilmB OF CYCLE 5 WPMulltns, Palisade.s lfllffiought Palisades DWetzel, P-ll-030A File 950/22*08*08/L STANDmG ORDER '00,...
4_1 __
Rev 0 IM'l't:PfHAl to Jlli C ! l"OHOt ite l APPROVED itJJJ}{()J;;;;
Plaut M.e.nager Baaed upon our rece-ot pt'oble?ll with tube lea.ks in A. Stea.rA Oel\\et'~tor, t:hero is a n.eed to provide more restrictive controls over the allO'fable prim.a~
to $econdary leak rates than allowed by Technical Specific~tion 3.1.5. These shall be in affact for the remainder of Cycle 5.
The followlog requi~e~nts ara 1pc.cifi~d; IMMEDIAIELY COMMENCE A CON'!ROLLED PLA.'tr SR11rDOWN I:F TRE TOTAL n.Df.AAY TO SECOND.ARY LE.il RATE EXCEEDS O.l GPM 'FOR ANY 'PKRIOD OF STEA!IY-ST.!l'E OPERATION GR.RATER THAN 24 OlNSBCOTIVE HOtra.s.
IN.ADDITION,. DUlUNi; P!RIODS OF STARTUP AND MAJOR !JJMJ CHANGES.
WEE.~ THE W.KAGE MKAf:UR.FJWIT SXNSIT!V!'l'Y IS !EDUCED, A CDN!ROU.ED PLANT SrnrrDOWN SHALL BE COl<H!NCED lP THE TOTAL PB.DfARY TO SECONDARY LEAK RJ>..TE EXCEEDS 0.6 GPK FORM TI:'RIO'O GREATER THAN 24 CONSECUTIVE HOURS.
I! any single leak. Tat~ dctcrm.lns.Uou u~oods the apPlic.ahle criteria epac.ifled atiovc., tho Duty and Cal.1 S~pe.rintendent shs.11 be immediat~y notified and the on-shift Cheml.st shall be contacted to beg.in increased survellla11ce a.a spttdfied by the Cbem.J.stry/Raalth Ph1sice Superintendent *