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  
{{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY
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.Enclosure: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 }}
 
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 snubbers was limited to that which occurred during its removal, grease was found in the control valve assembly and the snubber cylinder.
 
All of the recently greased snubbers were replaced by spare units.These two occurrences
 
illustrate
 
the necessity
 
of controlling
 
construction
 
and maintenance
 
practices
 
through the use of care-fully developed
 
procedures
 
designed to prevent errors, such as the introduction
 
of foreign materials
 
into safety-related
 
components.
 
This information
 
is provided as a notification
 
of a possibly significant
 
matter. It is expected that recipients
 
will review the information
 
for possible applicability
 
to their facilities.
 
No specific action or response is requested
 
at this time. If further NRC evaluations
 
so indicate, an IE Circular or Bulletin will be issued to recommend
 
or request soecific li-censee actions. If you have questions
 
regarding
 
this matter, please contact the Director of the appropriate
 
NRC Regional Office.Enclosure:
 
===Listing of IE Information===
Notices Issued in 1979 IE Information
 
March 21, 1979 Notice No. 79-05 LISTING OF IE INFORMATION
 
===NOTICES ISSUED IN 1979 Information===
Notice No.Subject Date Issued 79-01 79-02 79-03 79-04 79-05 Bergen-Paterson
 
Hydraulic Shock and Sway Arrestor Attempted
 
Extortion
 
-Low Enriched Uranium Limitorque
 
Valve Geared Limit Switch Lubricant Degradation
 
of Engineered
 
Safety Features Use of Improper Materials in Safety-Related
 
Components
 
2/2/79 2/2/79 2/9/79 Issued To .All power reactor facilities
 
with an OL or a CP All Fuel Facilities
 
All power reactor facilities
 
with an OL or a CP 2/16/79 All power reactor facilities
 
with an OL or a CP 3/21/79 All power reactor facilities
 
with an OL or CP }}


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

Revision as of 13:23, 31 August 2018

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 snubbers was limited to that which occurred during its removal, grease was found in the control valve assembly and the snubber cylinder.

All of the recently greased snubbers were replaced by spare units.These two occurrences

illustrate

the necessity

of controlling

construction

and maintenance

practices

through the use of care-fully developed

procedures

designed to prevent errors, such as the introduction

of foreign materials

into safety-related

components.

This information

is provided as a notification

of a possibly significant

matter. It is expected that recipients

will review the information

for possible applicability

to their facilities.

No specific action or response is requested

at this time. If further NRC evaluations

so indicate, an IE Circular or Bulletin will be issued to recommend

or request soecific li-censee actions. If you have questions

regarding

this matter, please contact the Director of the appropriate

NRC Regional Office.Enclosure:

Listing of IE Information

Notices Issued in 1979 IE Information

March 21, 1979 Notice No. 79-05 LISTING OF IE INFORMATION

NOTICES ISSUED IN 1979 Information

Notice No.Subject Date Issued 79-01 79-02 79-03 79-04 79-05 Bergen-Paterson

Hydraulic Shock and Sway Arrestor Attempted

Extortion

-Low Enriched Uranium Limitorque

Valve Geared Limit Switch Lubricant Degradation

of Engineered

Safety Features Use of Improper Materials in Safety-Related

Components

2/2/79 2/2/79 2/9/79 Issued To .All power reactor facilities

with an OL or a CP All Fuel Facilities

All power reactor facilities

with an OL or a CP 2/16/79 All power reactor facilities

with an OL or a CP 3/21/79 All power reactor facilities

with an OL or CP


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