Information Notice 1979-05, Use of Improper Materials in Safety-Related Components: Difference between revisions

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{{#Wiki_filter:UNITED STATESNUCLEAR REGULATORY COMMISSIONOFFICE OF INSPECTION AND ENFORCEMENTWASHINGTON, D.C. 20555March 21, 1979IE Information Notice No. 79-05USE OF IMPROPER MATERIALS IN SAFETY-RELATED COMPONENTSTwo instances of the addition of Improper materials to safety-relatedcomponents during maintenance have recently been identified by NRCinspections.Materials on Valve Seating SurfacesAn NRC inspector found that maintenance personnel at the Surry nuclearpower plant had added wax or grease to certain valve seating surfaces.These valves included the containment spray and recirculation sprayisolation valves. This material could have affected the measured leakrate through these containment penetrations. VEPCO personnel said thatthe material was believed to have been added to prevent damage to thevalve seating surfaces during dry valve testing. It had not been removedfollowing completion of the maintenance procedure. VEPCO personnel alsoreported that a lack of any definitive administrative guidance as towhat lubricants, if any, could be used during valve maintenance,contributed to this problem. The corrective action included modifica-tion of the procedures to include more precise Inspection by qualitycontrol personnel following valve maintenance.Grease in SnubbersAn NRC inspector found that maintenance personnel at the Browns Ferrynuclear power plant had added grease to the hydraulic fluid reservoirsof eight Bergen-Paterson snubbers. The grease had mistakenly beenadded, during a scheduled lubrication procedure, through the alemitetype fittings used for normal fluid addition. A similar error involvingthirteen snubbers had previously been made at this facility. At thattime the decision had been made to Install a different type of fittingon the snubbers. However, the replacement parts had not arrived in tinefor installation prior to the more recent lubrication. At the time ofthe earlier occurrence, TVA personnel had removed the affected snubbersand tested them for lock-up and bleed rate. The results had been withinspecification. Nevertheless, the units had been disassembled and cleanedprior to reinstallation. NRC inspectors witnessed the disassembly of oneof the later set of greased snubbers (a four-inch unit). Approximatelyone cubic inch of grease was found in the reservoir. Although the grease 9038001 80 IE Information Notice No. 79-05March 21, 1979Grease in Snubbers (continued)had been in the reservoir for only four days, and stroking cf thesnubbers was limited to that which occurred during its removal,grease was found in the control valve assembly and the snubbercylinder. All of the recently greased snubbers were replaced byspare units.These two occurrences illustrate the necessity of controllingconstruction and maintenance practices through the use of care-fully developed procedures designed to prevent errors, such as theintroduction of foreign materials into safety-related components.This information is provided as a notification of a possibly significantmatter. It is expected that recipients will review the information forpossible applicability to their facilities. No specific action or responseis requested at this time. If further NRC evaluations so indicate, an IECircular or Bulletin will be issued to recommend or request soecific li-censee actions. If you have questions regarding this matter, pleasecontact the Director of the appropriate NRC Regional Office.
{{#Wiki_filter:UNITED STATES


===Enclosure:===
NUCLEAR REGULATORY COMMISSION
Listing of IE InformationNotices Issued in 1979 IE InformationMarch 21, 1979Notice No. 79-05LISTING OF IE INFORMATION NOTICESISSUED IN 1979InformationNotice No.SubjectDateIssued79-0179-0279-0379-0479-05Bergen-Paterson HydraulicShock and Sway ArrestorAttempted Extortion -Low Enriched UraniumLimitorque Valve GearedLimit Switch LubricantDegradation ofEngineeredSafety FeaturesUse of Improper Materialsin Safety-RelatedComponents2/2/792/2/792/9/79Issued To .All power reactorfacilities with anOL or a CPAll Fuel FacilitiesAll power reactorfacilities with anOL or a CP2/16/79 All power reactorfacilities with anOL or a CP3/21/79 All power reactorfacilities with anOL or CP }}
 
OFFICE OF INSPECTION AND ENFORCEMENT
 
WASHINGTON, D.C. 20555 March 21, 1979 IE Information Notice No. 79-05 USE OF IMPROPER MATERIALS IN SAFETY-RELATED COMPONENTS
 
Two instances of the addition of Improper materials to safety-related
 
components during maintenance have recently been identified by NRC
 
inspections.
 
===Materials on Valve Seating Surfaces===
An NRC inspector found that maintenance personnel at the Surry nuclear
 
power plant had added wax or grease to certain valve seating surfaces.
 
These valves included the containment spray and recirculation spray
 
isolation valves. This material could have affected the measured leak
 
rate through these containment penetrations. VEPCO personnel said that
 
the material was believed to have been added to prevent damage to the
 
valve seating surfaces during dry valve testing. It had not been removed
 
following completion of the maintenance procedure. VEPCO personnel also
 
reported that a lack of any definitive administrative guidance as to
 
what lubricants, if any, could be used during valve maintenance, contributed to this problem. The corrective action included modifica- tion of the procedures to include more precise Inspection by quality
 
control personnel following valve maintenance.
 
Grease in Snubbers
 
An NRC inspector found that maintenance personnel at the Browns Ferry
 
nuclear power plant had added grease to the hydraulic fluid reservoirs
 
of eight Bergen-Paterson snubbers. The grease had mistakenly been
 
added, during a scheduled lubrication procedure, through the alemite
 
type fittings used for normal fluid addition. A similar error involving
 
thirteen snubbers had previously been made at this facility. At that
 
time the decision had been made to Install a different type of fitting
 
on the snubbers. However, the replacement parts had not arrived in tine
 
for installation prior to the more recent lubrication. At the time of
 
the earlier occurrence, TVA personnel had removed the affected snubbers
 
and tested them for lock-up and bleed rate. The results had been within
 
specification. Nevertheless, the units had been disassembled and cleaned
 
prior to reinstallation. NRC inspectors witnessed the disassembly of one
 
of the later set of greased snubbers (a four-inch unit). Approximately
 
one cubic inch of grease was found in the reservoir. Although the grease 29038001 80
 
IE Information Notice No. 79-05                          March 21, 1979 Grease in Snubbers (continued)
had been in the reservoir for only four days, and stroking
 
cf the
 
removal, snubbers was limited to that which occurred during its
 
grease was found in the control valve assembly and the snubber by
 
cylinder. All of the recently greased snubbers were replaced
 
spare units.
 
These two occurrences illustrate the necessity of controlling
 
care- construction and maintenance practices through the use of        as the
 
fully developed procedures designed  to  prevent  errors,  such
 
introduction of foreign materials into  safety-related    components.
 
significant
 
This information is provided as a notification of a possibly              for
 
recipients  will  review  the  information
 
matter. It is expected that                                              response
 
action or
 
possible applicability to their facilities. No specificso indicate, an IE
 
is requested at this time. If  further  NRC  evaluations
 
soecific li- Circular or Bulletin will be issued to recommend or request        please
 
censee actions. If you have questions regarding this matter, contact the Director of the appropriate  NRC  Regional  Office.
 
Enclosure:
Listing of IE Information
 
Notices Issued in 1979 IE Information Notice No. 79-05 March 21, 1979 LISTING OF IE INFORMATION NOTICES
 
ISSUED IN 1979 Information Subject                      Date      Issued To .
 
===Notice No.                               Issued===
79-01      Bergen-Paterson Hydraulic    2/2/79    All power reactor
 
Shock and Sway Arrestor                  facilities with an
 
OL or a CP
 
79-02      Attempted Extortion -         2/2/79    All Fuel Facilities
 
Low Enriched Uranium
 
79-03      Limitorque Valve Geared      2/9/79    All power reactor
 
Limit Switch Lubricant                  facilities with an
 
OL or a CP
 
79-04      Degradation of                2/16/79   All power reactor
 
Engineered                              facilities with an
 
Safety Features                          OL or a CP
 
79-05      Use of Improper Materials      3/21/79   All power reactor
 
in Safety-Related                        facilities with an
 
Components                              OL or CP }}


{{Information notice-Nav}}
{{Information notice-Nav}}

Latest revision as of 03:41, 24 November 2019

Use of Improper Materials in Safety-Related Components
ML031180120
Person / Time
Site: Waterford, 05000000
Issue date: 03/21/1979
From:
NRC/IE
To:
References
IN-79-005, NUDOCS 7903300180
Download: ML031180120 (3)
v • d • e


UNITED STATES

NUCLEAR REGULATORY COMMISSION

OFFICE OF INSPECTION AND ENFORCEMENT

WASHINGTON, D.C. 20555 March 21, 1979 IE Information Notice No. 79-05 USE OF IMPROPER MATERIALS IN SAFETY-RELATED COMPONENTS

Two instances of the addition of Improper materials to safety-related

components during maintenance have recently been identified by NRC

inspections.

Materials on Valve Seating Surfaces

An NRC inspector found that maintenance personnel at the Surry nuclear

power plant had added wax or grease to certain valve seating surfaces.

These valves included the containment spray and recirculation spray

isolation valves. This material could have affected the measured leak

rate through these containment penetrations. VEPCO personnel said that

the material was believed to have been added to prevent damage to the

valve seating surfaces during dry valve testing. It had not been removed

following completion of the maintenance procedure. VEPCO personnel also

reported that a lack of any definitive administrative guidance as to

what lubricants, if any, could be used during valve maintenance, contributed to this problem. The corrective action included modifica- tion of the procedures to include more precise Inspection by quality

control personnel following valve maintenance.

Grease in Snubbers

An NRC inspector found that maintenance personnel at the Browns Ferry

nuclear power plant had added grease to the hydraulic fluid reservoirs

of eight Bergen-Paterson snubbers. The grease had mistakenly been

added, during a scheduled lubrication procedure, through the alemite

type fittings used for normal fluid addition. A similar error involving

thirteen snubbers had previously been made at this facility. At that

time the decision had been made to Install a different type of fitting

on the snubbers. However, the replacement parts had not arrived in tine

for installation prior to the more recent lubrication. At the time of

the earlier occurrence, TVA personnel had removed the affected snubbers

and tested them for lock-up and bleed rate. The results had been within

specification. Nevertheless, the units had been disassembled and cleaned

prior to reinstallation. NRC inspectors witnessed the disassembly of one

of the later set of greased snubbers (a four-inch unit). Approximately

one cubic inch of grease was found in the reservoir. Although the grease 29038001 80

IE Information Notice No. 79-05 March 21, 1979 Grease in Snubbers (continued)

had been in the reservoir for only four days, and stroking

cf the

removal, snubbers was limited to that which occurred during its

grease was found in the control valve assembly and the snubber by

cylinder. All of the recently greased snubbers were replaced

spare units.

These two occurrences illustrate the necessity of controlling

care- construction and maintenance practices through the use of as the

fully developed procedures designed to prevent errors, such

introduction of foreign materials into safety-related components.

significant

This information is provided as a notification of a possibly for

recipients will review the information

matter. It is expected that response

action or

possible applicability to their facilities. No specificso indicate, an IE

is requested at this time. If further NRC evaluations

soecific li- Circular or Bulletin will be issued to recommend or request please

censee actions. If you have questions regarding this matter, contact the Director of the appropriate NRC Regional Office.

Enclosure:

Listing of IE Information

Notices Issued in 1979 IE Information Notice No. 79-05 March 21, 1979 LISTING OF IE INFORMATION NOTICES

ISSUED IN 1979 Information Subject Date Issued To .

Notice No. Issued

79-01 Bergen-Paterson Hydraulic 2/2/79 All power reactor

Shock and Sway Arrestor facilities with an

OL or a CP

79-02 Attempted Extortion - 2/2/79 All Fuel Facilities

Low Enriched Uranium

79-03 Limitorque Valve Geared 2/9/79 All power reactor

Limit Switch Lubricant facilities with an

OL or a CP

79-04 Degradation of 2/16/79 All power reactor

Engineered facilities with an

Safety Features OL or a CP

79-05 Use of Improper Materials 3/21/79 All power reactor

in Safety-Related facilities with an

Components OL or CP


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