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LER 97-009-01:on 970519,identified scenario that could be more limiting than design basis high energy line break in turbine bldg.Caused by insufficient detail in documentation. Replaced identified components.W/970618 ltr.

LER 97-009-01:on 970519,identified scenario that could be more limiting than design basis high energy line break in turbine bldg.Caused by insufficient detail in documentation. Replaced identified components.W/970618 ltr.
Paper図書
HEBERT, J. R.//STOWERS, G. N.MAINE YANKEE ATOMIC POWER CO.1997/06/18.
Other Libraries in Japan
  • Author HeadingHEBERT, J. R.//STOWERS, G. N.

LER 97-004-00:on 970122,discovered containment primary component cooling piping design inadequacy due to lack of thermal relief valves.Installed relief valve protection.W/ 970224 ltr.

LER 97-004-00:on 970122,discovered containment primary component cooling piping design inadequacy due to lack of thermal relief valves.Installed relief valve protection.W/ 970224 ltr.
Paper図書
HEBERT, J. R.//STOWERS, G. N.MAINE YANKEE ATOMIC POWER CO.1997/02/24.
Other Libraries in Japan
  • Author HeadingHEBERT, J. R.//STOWERS, G. N.

LER 97-003-00:on 970117,leaking fuel pins identified in Westinghouse fuel.Caused by grid-pin fretting at mid- assembly fuel spacer grids.Replaced all installed Westinghouse fuel assemblies.W/970218 ltr.

LER 97-003-00:on 970117,leaking fuel pins identified in Westinghouse fuel.Caused by grid-pin fretting at mid- assembly fuel spacer grids.Replaced all installed Westinghouse fuel assemblies.W/970218 ltr.
Paper図書
HEBERT, J. R.//STOWERS, G. N.MAINE YANKEE ATOMIC POWER CO.1997/02/18.
Other Libraries in Japan
  • Author HeadingHEBERT, J. R.//STOWERS, G. N.

LER 96-037-00:on 961114,leaking P-29C gland cooling check valve was observed.Caused by sticking check valve in gland cooling water supply line to pump.Affected check valves have been replaced.W/961216 ltr.

LER 96-037-00:on 961114,leaking P-29C gland cooling check valve was observed.Caused by sticking check valve in gland cooling water supply line to pump.Affected check valves have been replaced.W/961216 ltr.
Paper図書
HEBERT, J. R.//STOWERS, G. N.MAINE YANKEE ATOMIC POWER CO.1996/12/16.
Other Libraries in Japan
  • Author HeadingHEBERT, J. R.//STOWERS, G. N.

LER 96-038-00:on 961205,discovered cable separation.Caused indeterminate.Corrected wiring deficiencies associated w/ reactor trip breakers & manual trip buttons.W/970106 ltr.

LER 96-038-00:on 961205,discovered cable separation.Caused indeterminate.Corrected wiring deficiencies associated w/ reactor trip breakers & manual trip buttons.W/970106 ltr.
Paper図書
HEBERT, J. R.//STOWERS, G. N.MAINE YANKEE ATOMIC POWER CO.1997/01/06.
Other Libraries in Japan
  • Author HeadingHEBERT, J. R.//STOWERS, G. N.

LER 96-039-00:on 961207,both diesel generators were declared inoperable & TS remedial action 3.12.A entered.Caused by oversight in original surveillance procedure development. Surveillance procedures modified.W/970106 ltr.

LER 96-039-00:on 961207,both diesel generators were declared inoperable & TS remedial action 3.12.A entered.Caused by oversight in original surveillance procedure development. Surveillance procedures modified.W/970106 ltr.
Paper図書
HEBERT, J. R.//STOWERS, G. N.MAINE YANKEE ATOMIC POWER CO.1997/01/06.
Other Libraries in Japan
  • Author HeadingHEBERT, J. R.//STOWERS, G. N.

LER 96-027-00:on 960802,ventilation fans FN-44 A & B declared inoperable.Caused by potential failure of inlet vanes.Vanes pinned open & air actuators disconnected,design basis recovery for all SR ventilation sys.W/960829 ltr.

LER 96-027-00:on 960802,ventilation fans FN-44 A & B declared inoperable.Caused by potential failure of inlet vanes.Vanes pinned open & air actuators disconnected,design basis recovery for all SR ventilation sys.W/960829 ltr.
Paper図書
HEBERT, J. R.//STOWERS, G. N.MAINE YANKEE ATOMIC POWER CO.1996/08/29.
Other Libraries in Japan
  • Author HeadingHEBERT, J. R.//STOWERS, G. N.

LER 95-012-01:on 950929,residual heat removal spring reliefs determined inadequate.Caused by inadequacy in original sys design spec.Submitted Tech Spec amend & reviewed plant operation history.W/960621 ltr.

LER 95-012-01:on 950929,residual heat removal spring reliefs determined inadequate.Caused by inadequacy in original sys design spec.Submitted Tech Spec amend & reviewed plant operation history.W/960621 ltr.
Paper図書
HEBERT, J. R.//STOWERS, G. N.MAINE YANKEE ATOMIC POWER CO.1996/06/21.
Other Libraries in Japan
  • Author HeadingHEBERT, J. R.//STOWERS, G. N.

LER 96-009-00:on 960516,noted operability of Low Pressure Safety Injection header isolation valves non-conservative. Caused by personnel error.Verified valves open & briefed plant operators re event.W/960614 ltr.

LER 96-009-00:on 960516,noted operability of Low Pressure Safety Injection header isolation valves non-conservative. Caused by personnel error.Verified valves open & briefed plant operators re event.W/960614 ltr.
Paper図書
HEBERT, J. R.//STOWERS, G. N.MAINE YANKEE ATOMIC POWER CO.1996/06/14.
Other Libraries in Japan
  • Author HeadingHEBERT, J. R.//STOWERS, G. N.

LER 96-005-00:on 960315,discovered PAB masonry wall deficiency.Containment hydrogen purge line isolated & tagged out.Containment hydrogen purge sys line will be rerouted away from affected wall.W/960412 ltr.

LER 96-005-00:on 960315,discovered PAB masonry wall deficiency.Containment hydrogen purge line isolated & tagged out.Containment hydrogen purge sys line will be rerouted away from affected wall.W/960412 ltr.
Paper図書
HEBERT, J. R.//STOWERS, G. N.MAINE YANKEE ATOMIC POWER CO.1996/04/12.
Other Libraries in Japan
  • Author HeadingHEBERT, J. R.//STOWERS, G. N.

LER 95-017-00:on 951106,LSI-S-63 was leaking from inlet flange.Caused by weld defect.Cut & rewelded affected joint. W/951206 ltr.

LER 95-017-00:on 951106,LSI-S-63 was leaking from inlet flange.Caused by weld defect.Cut & rewelded affected joint. W/951206 ltr.
Paper図書
HEBERT, J. R.//STOWERS, G. N.MAINE YANKEE ATOMIC POWER CO.1995/12/06.
Other Libraries in Japan
  • Author HeadingHEBERT, J. R.//STOWERS, G. N.

LER 95-012-00:on 950929,RHR spring reliefs determined inadequate for low temp over pressure protection.Caused by inadequacy in original sys design specification for RH-S-24 & 25.Generic implications being developed.W/951027 ltr.

LER 95-012-00:on 950929,RHR spring reliefs determined inadequate for low temp over pressure protection.Caused by inadequacy in original sys design specification for RH-S-24 & 25.Generic implications being developed.W/951027 ltr.
Paper図書
HEBERT, J. R.//STOWERS, G. N.MAINE YANKEE ATOMIC POWER CO.1995/10/27.
Other Libraries in Japan
  • Author HeadingHEBERT, J. R.//STOWERS, G. N.

LER 95-008-00:on 950502,determined that two MOVs in HPSI sys susceptible to pressure locking phenomena.Postulated cause due to ambient temp increase & subsequent valve bonnet pressure increase.Precautionary mod planned.W/950531 ltr.

LER 95-008-00:on 950502,determined that two MOVs in HPSI sys susceptible to pressure locking phenomena.Postulated cause due to ambient temp increase & subsequent valve bonnet pressure increase.Precautionary mod planned.W/950531 ltr.
Paper図書
HEBERT, J. R.//STOWERS, G. N.MAINE YANKEE ATOMIC POWER CO.1995/05/31.
Other Libraries in Japan
  • Author HeadingHEBERT, J. R.//STOWERS, G. N.

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