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

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{{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY
{{#Wiki_filter:UNITED STATES


COMMISSION
NUCLEAR REGULATORY COMMISSION


OFFICE OF INSPECTION
OFFICE OF INSPECTION AND ENFORCEMENT


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


Notice No. 79-05 USE OF IMPROPER MATERIALS
Two instances of the addition of Improper materials to safety-related


IN SAFETY-RELATED
components during maintenance have recently been identified by NRC


COMPONENTS
inspections.


Two instances
===Materials on Valve Seating Surfaces===
An NRC inspector found that maintenance personnel at the Surry nuclear


of the addition of Improper materials
power plant had added wax or grease to certain valve seating surfaces.


to safety-related
These valves included the containment spray and recirculation spray


components
isolation valves. This material could have affected the measured leak


during maintenance
rate through these containment penetrations. VEPCO personnel said that


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


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


Materials
following completion of the maintenance procedure. VEPCO personnel also


on Valve Seating Surfaces An NRC inspector
reported that a lack of any definitive administrative guidance as to


found that maintenance
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


personnel
control personnel following valve maintenance.


at the Surry nuclear power plant had added wax or grease to certain valve seating surfaces.These valves included the containment
Grease in Snubbers


spray and recirculation
An NRC inspector found that maintenance personnel at the Browns Ferry


spray isolation
nuclear power plant had added grease to the hydraulic fluid reservoirs


valves. This material could have affected the measured leak rate through these containment
of eight Bergen-Paterson snubbers. The grease had mistakenly been


penetrations.
added, during a scheduled lubrication procedure, through the alemite


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


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


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


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


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


VEPCO personnel
the earlier occurrence, TVA personnel had removed the affected snubbers


also reported that a lack of any definitive
and tested them for lock-up and bleed rate. The results had been within


administrative
specification. Nevertheless, the units had been disassembled and cleaned


guidance as to what lubricants, if any, could be used during valve maintenance, contributed
prior to reinstallation. NRC inspectors witnessed the disassembly of one


to this problem. The corrective
of the later set of greased snubbers (a four-inch unit). Approximately


action included modifica-tion of the procedures
one cubic inch of grease was found in the reservoir. Although the grease 29038001 80


to include more precise Inspection
IE Information Notice No. 79-05                          March 21, 1979 Grease in Snubbers (continued)
had been in the reservoir for only four days, and stroking


by quality control personnel
cf the


following
removal, snubbers was limited to that which occurred during its


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


Grease in Snubbers An NRC inspector
cylinder. All of the recently greased snubbers were replaced


found that maintenance
spare units.


personnel
These two occurrences illustrate the necessity of controlling


at the Browns Ferry nuclear power plant had added grease to the hydraulic
care- construction and maintenance practices through the use of        as the


fluid reservoirs
fully developed procedures designed  to  prevent  errors,  such


of eight Bergen-Paterson
introduction of foreign materials into  safety-related    components.


snubbers.
significant


The grease had mistakenly
This information is provided as a notification of a possibly              for


been added, during a scheduled
recipients  will  review  the  information


lubrication
matter. It is expected that                                              response


procedure, through the alemite type fittings used for normal fluid addition.
action or


A similar error involving thirteen snubbers had previously
possible applicability to their facilities. No specificso indicate, an IE


been made at this facility.
is requested at this time. If  further  NRC  evaluations


At that time the decision had been made to Install a different
soecific li- Circular or Bulletin will be issued to recommend or request        please


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


However, the replacement
Enclosure:
Listing of IE Information


parts had not arrived in tine for installation
Notices Issued in 1979 IE Information Notice No. 79-05 March 21, 1979 LISTING OF IE INFORMATION NOTICES


prior to the more recent lubrication.
ISSUED IN 1979 Information Subject                      Date      Issued To .


At the time of the earlier occurrence, TVA personnel
===Notice No.                                Issued===
79-01      Bergen-Paterson Hydraulic    2/2/79    All power reactor


had removed the affected snubbers and tested them for lock-up and bleed rate. The results had been within specification.
Shock and Sway Arrestor                  facilities with an


Nevertheless, the units had been disassembled
OL or a CP


and cleaned prior to reinstallation.
79-02      Attempted Extortion -        2/2/79    All Fuel Facilities


NRC inspectors
Low Enriched Uranium


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


the disassembly
Limit Switch Lubricant                  facilities with an


of one of the later set of greased snubbers (a four-inch
OL or a CP


unit). Approximately
79-04      Degradation of                2/16/79  All power reactor


one cubic inch of grease was found in the reservoir.
Engineered                              facilities with an


Although the grease 29038001 80
Safety Features                          OL or a CP
IE Information


Notice No. 79-05 March 21, 1979 Grease in Snubbers (continued)
79-05       Use of Improper Materials      3/21/79  All power reactor
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.
in Safety-Related                        facilities with an


All of the recently greased snubbers were replaced by spare units.These two occurrences
Components                               OL or CP }}
 
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}}

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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