Information Notice 1995-41, Degradation of Ventilation System Charcoal Resulting from Chemical Cleaning of Steam Generators: Difference between revisions

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{{#Wiki_filter:K9J(UNITED STATESNUCLEAR REGULATORY COMMISSIONOFFICE OF NUCLEAR REACTOR REGULATIONWASHINGTON, D.C. 20555-0001September 22, 1995NRC INFORMATION NOTICE 95-41: DEGRADATION OF VENTILATION SYSTEM CHARCOALRESULTING FROM CHEMICAL CLEANING OF STEAMGENERATORS
{{#Wiki_filter:K9J(UNITED STATES NUCLEAR REGULATORY
 
COMMISSION
 
===OFFICE OF NUCLEAR REACTOR REGULATION===
WASHINGTON, D.C. 20555-0001 September
 
22, 1995 NRC INFORMATION
 
NOTICE 95-41: DEGRADATION
 
OF VENTILATION
 
SYSTEM CHARCOAL RESULTING
 
===FROM CHEMICAL CLEANING OF STEAM GENERATORS===


==Addressees==
==Addressees==
All holders of operating licenses or construction permits for nuclear powerreactors.
All holders of operating
 
licenses or construction
 
permits for nuclear power reactors.


==Purpose==
==Purpose==
The U.S. Nuclear Regulatory Commission (NRC) is issuing this informationnotice to alert addressees to the potential degradation of ventilation systemcharcoal as a result of the charcoal's exposure to chemicals during thechemical cleaning of steam generators. It is expected that recipients willreview the information for applicability to their facilities and consideractions, as appropriate, to avoid similar problems. However, suggestionscontained in this information notice are not NRC requirements; therefore, nospecific action or written response is required.
The U.S. Nuclear Regulatory
 
Commission (NRC) is issuing this information
 
notice to alert addressees
 
to the potential
 
degradation
 
of ventilation
 
system charcoal as a result of the charcoal's
 
exposure to chemicals
 
during the chemical cleaning of steam generators.
 
It is expected that recipients
 
will review the information
 
for applicability
 
to their facilities
 
and consider actions, as appropriate, to avoid similar problems.
 
===However, suggestions===
contained
 
in this information
 
notice are not NRC requirements;  
therefore, no specific action or written response is required.Description
 
of Circumstances
 
On June 5, 1994, a chemical cleaning of the secondary
 
sides of the steam generators
 
at Surry Unit 2 was begun. During this cleaning, containment
 
purge was established
 
using train A of the auxiliary
 
ventilation
 
system, which contains a safety-grade
 
charcoal adsorber.
 
The chemical cleaning process involves the--use of ethylene diamine tetraacetic
 
acid (EDTA) as the cleaning agent and of various other chemicals
 
such as ethylenediamine (EDA), hydrazine, ammonia, hydrogen peroxide, nitrogen, and CCl-801, a proprietary
 
corrosion inhibitor.
 
During the chemical cleaning the steam generators
 
were isolated from the containment
 
atmosphere
 
and force-vented
 
to the outdoor atmosphere
 
through the atmospheric
 
steam dump relief valves. The steam generators
 
were rinsed to remove residual chemicals.
 
===After the rinse, the steam generators===
were opened for sludge lancing of the tube sheet region.On June 16, 1994, a strong odor of ammonia was reported in the Unit 2 containment.
 
Concentrations
 
were measured at 30 ppm (parts per million)ammonia and 6 ppm hydrazine.
 
Consequently, personnel
 
were evacuated
 
from the containment.
 
At the time of the evacuation, the chemical cleaning and rinse had been completed
 
on steam generators
 
A and C and the steam generators
 
were vented to the containment.
 
Because of the elevated levels of hydrazine
 
and ammonia in the containment, train B of the auxiliary
 
ventilation
 
system was started to assist train A in reducing the airborne concentrations.
 
Both trains operated approximately
 
8 hours until chemical concentrations
 
in the containment
 
were reduced.950918034 t~q~gut II @
IN 95-41 September
 
22, 1995 -As a result of the exposure of the charcoal to the chemicals, in accordance
 
with the technical
 
specifications (TS), a sample of train A charcoal was taken and a laboratory
 
test of a sample of the sample was performed.
 
The results of the laboratory
 
test showed a methyl iodide removal efficiency
 
of 93.4 percent, which was below the TS limit. The charcoal was replaced.
 
A sample from train B was tested and the results of the laboratory
 
test of that sample showed a methyl iodide removal efficiency
 
of 90.7 percent. This value was also below the TS limit, and the train B charcoal was replaced.The failure of these samples was a surprise to the licensee.
 
At the time the charcoal was determined
 
to have failed, train A had operated for 657 hours, while the train B had operated for 360 hours. In addition, the licensee had held discussions
 
with the charcoal supplier during which the supplier had indicated
 
that exposure of the charcoal to hydrazine
 
and ammonia in the above noted concentrations
 
should not have resulted in its degradation.
 
As a result of the experience
 
at Unit 2, when the steam generators
 
at Unit 1 were chemically
 
cleaned, the licensee arranged for the containment
 
flow to be diverted to a non-safety-grade
 
system containing
 
charcoal.
 
When the licensee completed
 
the cleaning operation, laboratory
 
testing of the charcoal in the non-safety-grade
 
system showed that the adsorber efficiency
 
was 3.3 percent less than its efficiency
 
before the chemical cleaning.
 
On the basis of these two experiences, the licensee concluded
 
that discharging
 
the air involved in steam generator
 
cleaning operations
 
through systems containing
 
charcoal was likely to degrade the charcoal.The licensee's
 
laboratory
 
tests of the charcoal were performed
 
at 30C [86°F]and a relative humidity of 95 percent with a face velocity of 24.4 meters per minute [80 feet per minute]. The laboratory
 
tests were conducted
 
using the 1979 version of American Society for Testing and Materials (ASTM) D3803, Standard Test Method for Nuclear-Grade
 
Activated
 
Carbon.' The licensee did not attempt to determine
 
the chemical compound responsible
 
for the degradation
 
of the charcoal.
 
However, it and its charcoal supplier believe that the probable culprits were EDA and EDTA.The NRC staff held telephone
 
conversations
 
with charcoal suppliers
 
and testing laboratory
 
representatives.
 
Based upon these conversations, the parties concluded
 
that, although the ammonia did not contribute
 
to the degradation
 
of the charcoal, the breakdown
 
of hydrazine
 
in the charcoal may have contributed
 
additional
 
moisture to the charcoal resulting
 
in its degradation.
 
These discussions
 
also confirmed
 
that both EDA and EDTA could degrade the charcoal.
 
The staff also noted that, had the licensee performed the laboratory
 
tests in accordance
 
with the guidance in NRC Information
 
Notice 87-32, "Deficiencies
 
in the Testing of Nuclear-Grade
 
Activated
 
Charcoal," (Accession
 
No. 8707070003)
or in accordance
 
with the 1989 version of ASTM D3803, the measured degradation
 
of the charcoal would have been greater than that identified
 
by the licensee.
 
K..- V IN 95-41 September
 
22, 1995 Exposure of charcoal to chemical compounds
 
can result in its degradation.
 
With such degradation, in the event of an accident, the charcoal may perform at an efficiency
 
less than that assumed in the staff's safety evaluation.
 
Therefore, if licensees
 
divert air flow through charcoal adsorbers
 
in their ventilation
 
systems during and/or after chemical cleaning, they may find it appropriate
 
to perform a laboratory
 
test of the charcoal to ensure that the charcoal has not degraded below its TS surveillance
 
requirements
 
limit.This information
 
notice requires no specific action or written response.
 
If you have any questions
 
about the information
 
in this notice, please contact the technical
 
contact listed below or the appropriate
 
Office of Nuclear Reactor Regulation (NRR) project manager.'nn .1%ic I Division of Reactor Pr ram Management
 
===Office of Nuclear Reactor Regulation===
Technical
 
contact: John J. Hayes, NRR (301) 415-3167 Attachments:
1. Referenced
 
Codes and Standards 2. List of Recently Issued NRC Information
 
Notices A4e UQ FJLa
 
~1 <-J Attachment
 
1 IN 95-41 September
 
22, 1995 Referenced
 
Codes and Standards American Society for Testing and Materials, ASTM D3803, "Standard
 
Test Method for Nuclear-Grade
 
Activated
 
Carbon,' Philadelphia, Pennsylvania.
 
wXvachment
 
2 IN 95-41 September
 
22, 1995 LIST OF RECENTLY ISSUED NRC INFORMATION
 
NOTICES Information
 
Date of Notice No. Subject Issuance Issued to 95-40 95-39 95-38 95-37 Supplemental
 
Information
 
to Generic Letter 95-03,"Circumferential
 
Cracking of Steam Generator
 
Tubes" Brachytherapy
 
Incidents Involving
 
Treatment Planning Errors Degradation
 
of Boraflex Neutron Absorber in Spent Fuel Storage Racks Inadequate
 
Offsite Power System Voltages during Design-Basis
 
Events 09/20/95 09/19/95 09/08/95 09/07/95 All holders of OLs or CPs for nuclear power reactors.All U.S. Nuclear Regulatory
 
Commission
 
Medical Licensees.
 
All holders of OLs or CPs for nuclear power reactors.All holders of OLs or CPs for nuclear power reactors.95-36 Potential Post-Fire Lighting Problems with Emergency 08/29/95 All holders of OLs or CPs for nuclear power reactors.95-35 95-34 93-83, Supp. 1 95-33 Degraded Ability of Steam Generators
 
to Remove Decay Heat by Natural Circulation
 
Air Actuator and Supply Air Regulator
 
Problems in Copes-Vulcan
 
Pressurizer
 
Power-Operated
 
Relief Valves Potential
 
Loss of Spent Fuel Pool Cooling After a Loss-of-Coolant
 
Accident or a Loss of Offsite Power Switchgear
 
Fire and Partial Loss of Offsite Power at Waterford Generating
 
Station, Unit 3 08/28/95 08/25/95 08/24/95 08/23/95 All holders of OLs or CPs for pressurized
 
water reactors (PWRs).All holders of OLs or CPs for nuclear power reactors.All holders of OLs or CPs for nuclear power reactors.All holders of OLs or CPs for nuclear power reactors.I OL -Operating
 
License CP = Construction
 
Permit
 
K>IN 95-41 September
 
22, 1995 Exposure of charcoal to chemical compounds
 
can result in a degradation
 
of the charcoal.
 
With such degradation, in the event of an accident, the charcoal may perform at an efficiency
 
less than that assumed in the staff's safety evaluation.
 
Therefore, if licensees
 
divert air flow through charcoal adsorbers in their ventilation
 
systems during and/or following
 
chemical cleaning, they may find it appropriate
 
to perform a laboratory
 
test of the charcoal to ensure that the charcoal has not degraded below its TS surveillance
 
requirements
 
limit.This information
 
notice requires no specific action or written response.
 
If you have any questions
 
about the information
 
in this notice, please contact the technical
 
contact listed below or the appropriate
 
Office of Nuclear Reactor Regulation (NRR) project manager.orig /s/'d by DMCrutchfield
 
Dennis M. Crutchfield, Director Division of Reactor Program Management
 
===Office of Nuclear Reactor Regulation===
Technical
 
contact: John J. Hayes, NRR (301) 415-3167 Attachments:
1. Referenced
 
Codes and Standards 2. List of Recently Issued NRC Information
 
Notices DOCUMENT NAME: 95-41.IN*See previous concurrence
 
To receive a copy of this document, indicate In the box: C' = Copy without attachment/enclosure
 
'E' = Copy with attachmentlenclosure
 
'N' -No copy OFFICE TERB:DOTS
 
IC ADM:PUB IN OECB:DOPS
 
I E SC/TERB:DOTS
 
E C/TERB:DOTS
 
LE NAME JJHayes* Tech Ed/MMejac*
RABenedict*
RLEmch* CLMiller*DATE 05/02/95 05/10/95 05/02/95 105/02/ 95 05/02/95.....-.I OFFICE 1SC/OECB:DOPS
 
IN IPECB:DRPM
 
I E IC/PECB:DRPM
 
I NID/DR~1X, I 11 NAME EFGoodwin*
RKiessel*
el DATE 05/15/95 1 3909/14/95
09 95 UtiilLIAL
 
K-IUKU WURY
 
IN 95-xx September
 
xx, 1995 Exposure of charcoal to chemical compounds
 
can result in a degradation
 
of the charcoal.
 
With such degradation, in the event of an accident, the charcoal may perform at an efficiency
 
less than that assumed in the staff's safety evaluation.
 
Therefore, if licensees
 
divert air flow through charcoal adsorbers in their ventilation
 
systems during and/or following
 
chemical cleaning, they may find it appropriate
 
to perform a laboratory
 
test of the charcoal to ensure that the charcoal has not degraded below its TS surveillance
 
requirements
 
limit.This information
 
notice requires no specific action or written response.
 
If you have any questions
 
about the information
 
in this notice, please contact the technical
 
contact listed below or the appropriate
 
Office of Nuclear Reactor Regulation (NRR) project manager.Dennis M. Crutchfield, Director Division of Reactor Program Management
 
===Office of Nuclear Reactor Regulation===
Technical
 
contact: John J. Hayes, NRR (301) 415-3167 Attachments:
1. Referenced
 
Codes and Standards 2. List of Recently Issued NRC Information
 
Notices DOCUMENT NAME: S:\DRPM SEC\CHR91438
*See previous concurrence
 
-a_ An Ad_ try -.--- -ta~ rh otonl IF' .Cnnv with atnchmentlenclosure
 
*N' -No copy T o receive a copy 0? this cocunwnt, Indicate mn Xn. o:A; -s&deg;Pqt wnn u--a........
 
o ---- -. -OFFICE TERB:DOTS
 
IC ADM:[PUB NOECB:DOPS
 
I E SC/TERB:DOTSI
 
E IC/TRB:DOTSE
 
NAME JJHayes* Tech Ed/MMejac*
RABenedict*
RLEmch*DATE 05/02/95 105/10/95
105/02/95
05/02/95_
05/02/9--.---r-I -I .I &Ii M fr~ .nnLA nFFT(F ISC/OECB!DOPS
 
IN IPECH: URPM I t IL/ tLt1:UKrM I1 IU UKNrr I -11-- _, ___ .__.__ ..__ _ _ .__NAME EFGoodwin*
I RKiessel*
_AEChaffee*
 
===IDMCrutchfieldqI===
DATE 05/15/95 109/13/95
--9/1/95 099 UOFICIIAL
 
KLLUKU HUrY
 
IN 95-xx September
 
xx, 1995 Exposure of charcoal to chemical compounds
 
can result in a degradation
 
of the charcoal.
 
With such degradation, in the event of an accident, the charcoal may perform at an efficiency
 
less than that assumed in the staff's safety evaluation.
 
Therefore, if licensees
 
divert air flow through charcoal adsorbers in their ventilation
 
systems during and/or following
 
chemical cleaning, they may find it appropriate
 
to perform a laboratory
 
test of the charcoal to ensure that the charcoal has not degraded below its TS surveillance
 
requirements
 
limit.This information
 
notice requires no specific action or written response.
 
If you have any questions
 
about the information
 
in this notice, please contact the technical
 
contact listed below or the appropriate
 
Office of Nuclear Reactor Regulation (NRR) project manager.Dennis M. Crutchfield, Director Division of Reactor Program Management
 
===Office of Nuclear Reactor Regulation===
Technical
 
Contact: John J. Hayes, NRR (301) 415-3167 Attachments:
1. Referenced
 
Codes and Standards 2. List of Recently Issued NRC Information
 
Notices DOCUMENT NAME: G:\IN\CHR91438
*See previous concurrence
 
-- .-rt S. *" 11. b_-f -t -fthrA
 
* ttsdtmfilfntjnfLd
 
E = COnY with =tachmerd/en
 
e^suu. '' a No copy re lculy.
 
* wpy. u.l ocuun....
 
-.w --I I OFFICE TERB:DOTS
 
lC ADM:PUB IN OECB:DOPS
 
E E SC/TERB:DOTSI
 
E C/NAME JJHayes* Tech Ed/MMejac*
RABenedict*
RLEmch* CLMiller*DATE 05/02/95 05/10/95 05/02/95 05/02/95 05/02/95.M. a.(FF FIC SCIFECR:DOPS
 
I N I PECB:DRPM I E I UPLUB; WPM IA/IUUKrfi
 
I I I I -I .-- .' -- 0 .... .... ... -,,, ...-NAME 1EFGoodwin*
_RKiessel
 
42 AEChaffee
 
_ DMCrutchfeld
 
lDATE 105/15/95
109/J3 /95 1fj1 T 09/.5 /95 09/ /95^rIrY 0 TAiI nrffnn% n glf OFF lVlAL KcvuKu vuri
 
IN 95-xx May xx, 1995 Exposure of charcoal to chemical compounds
 
can result in a degradation
 
of the charcoal.
 
With such degradation, in the event of an accident, the charcoal may perform at an efficiency
 
less than that assumed in the staff's safety evaluation.
 
Therefore, if licensees
 
divert air flow through charcoal adsorbers in their ventilation
 
systems during and/or following
 
chemical cleaning, they may find it appropriate
 
to perform a laboratory
 
test of the charcoal to ensure that the charcoal has not degraded below its TS surveillance
 
requirements
 
limit.This information
 
notice requires no specific action or written response.
 
If you have any questions
 
about the information
 
in this notice, please contact the technical
 
contact listed below or the appropriate
 
Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Project Support Office of Nuclear Reactor Regulation
 
Technical
 
Contact: John J. Hayes, NRR (301) 415-3167 Attachments:
1. Referenced
 
Codes and Standards 2. List of Recently Issued NRC Information
 
Notices DOCUMENT NAME: G:\IN\CHR91438
*See previous concurrence
 
To receive a copy of this document, Indicate In the box: C" = Copy without attachmentlenclosure
 
'E' = Copy with attachment/enclosure
 
ON' -No copy OFFICE TERB:DOTS
 
C A M:PUB 1 N [OECB:DOPS
 
E SC/TERB:DOTS
 
lE C/TERB:DOTS
 
K E NAME JJHayes* Tech Ed/MMejac*
RABenedict*
RLEmch* ICLMiller*
DATE 05/02/95 05/10/95 105/02/95
105/02/95
05/02/95 a AI nFrTrr I SC/fECBRiOPS
 
I N IOECB:DOPS
 
I IM/utCu:VUVp
 
I I uIuurP 1 11-_ .--- -. -I- v .A _ .--NAME EFGoodwin*
_ RKiessel IAEChaffee
 
SUB BKGrimes DATE 05/15/95 05/ /95 05/ /95 105/ /95 nrchIrTAI
 
nrv'nnn fflV 01-1-11,1AL
 
KELUKU ,Ur 1 IN 95-xx May xx, 1995 Exposure of charcoal to chemical compounds
 
can result in a degradation
 
of the charcoal.
 
With such degradation, in the event of an accident, the charcoal may perform at an efficiency
 
less than that assumed in the staff's safety evaluation.
 
Therefore, if licensees
 
divert air flow through charcoal adsorbers in their ventilation
 
systems during and/or following
 
chemical cleaning, they may find it appropriate
 
to perform a laboratory
 
test of the charcoal to ensure that the charcoal has not degraded below its TS surveillance
 
requirements
 
limit.This information
 
notice requires no specific action or written response.
 
If you have any questions
 
about the information
 
in this notice, please contact the technical
 
contact listed below or the appropriate
 
Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Project Support Office of Nuclear Reactor Regulation
 
Technical
 
Contact: John J. Hayes, NRR (301) 415-3167 Attachments:
1. Referenced
 
Codes and Standards 2. List of Recently Issued NRC Information
 
Notices DOCUMENT NAME: G:\IN\CHR91438
*See previous concurrence
 
To receive a copy of this document, Indicate In the box: ACT -Copy without attachmentlenclosure
 
'E'
* Copy with attachmentlenclosure
 
SNH -No copy OFFICE TERB:DOTS
 
IC ADM:PUB [ OECB:DOPS
 
I E SC/TERB:DOTS
 
I E C/TERB:DOTS
 
I E NAME JJHayes* Tech Ed/MMejac*
[RABenedict*
IRLEmch* CLMiller*DATE 05/02/95 05/10/95 105/02/95
05/02/95 05/02/95 IIOFFICE 1SC/OECB:DOPS
 
I I C/OECB:DOPS
 
I D/DOPS I 1I NAME EFGoodwin
 
X 1AEChaffee
 
% 5b I mKGriImes DATE 105/16E/9505/
/95 05/ /95 OFFICIAL RECORD COPY
 
-0 '"?;4 -Exposure of charcoal to chemical compounds
 
can result in a degradation
 
of the charcoal.
 
With such degradation, in the event of an accident, the charcoal may perform at an efficiency
 
less than that assumed in the staff's safety evaluation.
 
Therefore, if licensees
 
divert air flow through charcoal adsorbers in their ventilation
 
systems during and/or following
 
chemical cleaning, they may find it appropriate
 
to perform a laboratory
 
test of the charcoal to ensure that the charcoal has not degraded below its TS surveillance
 
requirements
 
limit.This information
 
notice requires no specific action or written response.
 
If you have any questions
 
about the information
 
in this notice, please contact the technical
 
contact listed below or the appropriate
 
Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Project Support Office of Nuclear Reactor Regulation
 
A -...-
Technical
 
Contact: John J. Hayes, NRR (301) 415-3167 Attachments:
1. Referenced
 
Codes and Standards 2. List of Recently Issued NRC Information
 
Notices DOCUMENT NAME: G:\IN\CHR91438
*See previous concurrence
 
To receive a copy of this document, Indicate In the box: "C' a Copy without attachmentenclosure "F = Copy with attachment/enclosure "N" -No copy-_ _ _ _ -_ .l OFFICE ITERB:DOTS
 
IC ADM:PUB I OECB:DOPS I E ISC/TERB:DOTS
 
I E IC/TER.B:DOTS
 
I E 11 NAME JJHayes* j ITech Ed 1 A!ndJRABenedict*
IRLEmch* --_- CLMiller*DATE 105/02/95
105/1o /95 105/02/95
105/02/95
105/02/95 A- -A _ A __OFFICE ISC/OECB:DOPS
 
l C/OECB:DOPS
 
I D/DOPS I l1 NAME EFGoodwin
 
JAEChaffee
 
BKGrimes DATE 05/ /95 105/ /95 05/ /95:.UIIILIAL KtLUKU COPY 7,,, A; -..
 
K>~Exposure of charcoal to chemical compounds
 
can result in a degradation
 
of the charcoal.
 
With such degradation, in the event of an accident, the charcoal may perform at an efficiency
 
less than that assumed in the staff's safety evaluation.
 
Therefore, if licensees
 
divert air flow through charcoal adsorbers in their ventilation
 
systems during and/or following
 
chemical cleaning, they may find it appropriate
 
to perform a laboratory
 
test of the charcoal to ensure that the charcoal has not degraded below its TS surveillance
 
requirements
 
limit.This information
 
notice requires no specific action or written response.


==Description of Circumstances==
If you have any questions
On June 5, 1994, a chemical cleaning of the secondary sides of the steamgenerators at Surry Unit 2 was begun. During this cleaning, containment purgewas established using train A of the auxiliary ventilation system, whichcontains a safety-grade charcoal adsorber. The chemical cleaning processinvolves the--use of ethylene diamine tetraacetic acid (EDTA) as the cleaningagent and of various other chemicals such as ethylenediamine (EDA), hydrazine,ammonia, hydrogen peroxide, nitrogen, and CCl-801, a proprietary corrosioninhibitor. During the chemical cleaning the steam generators were isolatedfrom the containment atmosphere and force-vented to the outdoor atmospherethrough the atmospheric steam dump relief valves. The steam generators wererinsed to remove residual chemicals. After the rinse, the steam generatorswere opened for sludge lancing of the tube sheet region.On June 16, 1994, a strong odor of ammonia was reported in the Unit 2containment. Concentrations were measured at 30 ppm (parts per million)ammonia and 6 ppm hydrazine. Consequently, personnel were evacuated from thecontainment. At the time of the evacuation, the chemical cleaning and rinsehad been completed on steam generators A and C and the steam generators werevented to the containment. Because of the elevated levels of hydrazine andammonia in the containment, train B of the auxiliary ventilation system wasstarted to assist train A in reducing the airborne concentrations. Bothtrains operated approximately 8 hours until chemical concentrations in thecontainment were reduced.950918034t~q~gut II @
IN 95-41September 22, 1995 -As a result of the exposure of the charcoal to the chemicals, in accordancewith the technical specifications (TS), a sample of train A charcoal was takenand a laboratory test of a sample of the sample was performed. The results ofthe laboratory test showed a methyl iodide removal efficiency of 93.4 percent,which was below the TS limit. The charcoal was replaced. A sample fromtrain B was tested and the results of the laboratory test of that sampleshowed a methyl iodide removal efficiency of 90.7 percent. This value wasalso below the TS limit, and the train B charcoal was replaced.The failure of these samples was a surprise to the licensee. At the time thecharcoal was determined to have failed, train A had operated for 657 hours,while the train B had operated for 360 hours. In addition, the licensee hadheld discussions with the charcoal supplier during which the supplier hadindicated that exposure of the charcoal to hydrazine and ammonia in the abovenoted concentrations should not have resulted in its degradation.As a result of the experience at Unit 2, when the steam generators at Unit 1were chemically cleaned, the licensee arranged for the containment flow to bediverted to a non-safety-grade system containing charcoal. When the licenseecompleted the cleaning operation, laboratory testing of the charcoal in thenon-safety-grade system showed that the adsorber efficiency was 3.3 percentless than its efficiency before the chemical cleaning. On the basis of thesetwo experiences, the licensee concluded that discharging the air involved insteam generator cleaning operations through systems containing charcoal waslikely to degrade the charcoal.The licensee's laboratory tests of the charcoal were performed at 30C [86&deg;F]and a relative humidity of 95 percent with a face velocity of 24.4 meters perminute [80 feet per minute]. The laboratory tests were conducted using the1979 version of American Society for Testing and Materials (ASTM) D3803,Standard Test Method for Nuclear-Grade Activated Carbon.' The licensee didnot attempt to determine the chemical compound responsible for the degradationof the charcoal. However, it and its charcoal supplier believe that theprobable culprits were EDA and EDTA.The NRC staff held telephone conversations with charcoal suppliers andtesting laboratory representatives. Based upon these conversations, theparties concluded that, although the ammonia did not contribute to thedegradation of the charcoal, the breakdown of hydrazine in the charcoal mayhave contributed additional moisture to the charcoal resulting in itsdegradation. These discussions also confirmed that both EDA and EDTA coulddegrade the charcoal. The staff also noted that, had the licensee performedthe laboratory tests in accordance with the guidance in NRC Information Notice87-32, "Deficiencies in the Testing of Nuclear-Grade Activated Charcoal,"(Accession No. 8707070003) or in accordance with the 1989 version of ASTMD3803, the measured degradation of the charcoal would have been greater thanthat identified by the licensee.


K..- V IN 95-41September 22, 1995 Exposure of charcoal to chemical compounds can result in its degradation.With such degradation, in the event of an accident, the charcoal may performat an efficiency less than that assumed in the staff's safety evaluation.Therefore, if licensees divert air flow through charcoal adsorbers in theirventilation systems during and/or after chemical cleaning, they may find itappropriate to perform a laboratory test of the charcoal to ensure that thecharcoal has not degraded below its TS surveillance requirements limit.This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation (NRR) project manager.'nn .1%ic IDivision of Reactor Pr ram ManagementOffice of Nuclear Reactor RegulationTechnical contact: John J. Hayes, NRR(301) 415-3167Attachments:1. Referenced Codes and Standards2. List of Recently Issued NRC Information NoticesA4e UQ FJLa
about the information


~1 <-J Attachment 1IN 95-41September 22, 1995 Referenced Codes and StandardsAmerican Society for Testing and Materials, ASTM D3803, "Standard Test Methodfor Nuclear-Grade Activated Carbon,' Philadelphia, Pennsylvania.
in this notice, please contact the technical


wXvachment 2IN 95-41September 22, 1995 LIST OF RECENTLY ISSUEDNRC INFORMATION NOTICESInformation Date ofNotice No. Subject Issuance Issued to95-4095-3995-3895-37Supplemental Informationto Generic Letter 95-03,"Circumferential Crackingof Steam Generator Tubes"Brachytherapy IncidentsInvolving TreatmentPlanning ErrorsDegradation of BoraflexNeutron Absorber inSpent Fuel Storage RacksInadequate Offsite PowerSystem Voltages duringDesign-Basis Events09/20/9509/19/9509/08/9509/07/95All holders of OLs or CPsfor nuclear power reactors.All U.S. Nuclear RegulatoryCommission MedicalLicensees.All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.95-36PotentialPost-FireLightingProblems withEmergency08/29/95All holders of OLs or CPsfor nuclear power reactors.95-3595-3493-83,Supp. 195-33Degraded Ability ofSteam Generators toRemove Decay Heat byNatural CirculationAir Actuator and SupplyAir Regulator Problems inCopes-Vulcan PressurizerPower-Operated Relief ValvesPotential Loss of SpentFuel Pool Cooling After aLoss-of-Coolant Accidentor a Loss of Offsite PowerSwitchgear Fire andPartial Loss of OffsitePower at WaterfordGenerating Station, Unit 308/28/9508/25/9508/24/9508/23/95All holders of OLs or CPsfor pressurized waterreactors (PWRs).All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.All holders of OLs or CPsfor nuclear power reactors.IOL -Operating LicenseCP = Construction Permit
contact listed below or the appropriate


K>IN 95-41September 22, 995Exposure of charcoal to chemical compounds can result in a degradation of thecharcoal. With such degradation, in the event of an accident, the charcoalmay perform at an efficiency less than that assumed in the staff's safetyevaluation. Therefore, if licensees divert air flow through charcoal adsorbersin their ventilation systems during and/or following chemical cleaning, theymay find it appropriate to perform a laboratory test of the charcoal to ensurethat the charcoal has not degraded below its TS surveillance requirementslimit.This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation (NRR) project manager.orig /s/'d by DMCrutchfieldDennis M. Crutchfield, DirectorDivision of Reactor Program ManagementOffice of Nuclear Reactor RegulationTechnical contact: John J. Hayes, NRR(301) 415-3167Attachments:1. Referenced Codes and Standards2. List of Recently Issued NRC Information NoticesDOCUMENT NAME: 95-41.IN*See previous concurrenceTo receive a copy of this document, indicate In the box: C' = Copy without attachment/enclosure 'E' = Copy with attachmentlenclosure 'N' -No copyOFFICE TERB:DOTS IC ADM:PUB IN OECB:DOPS I E SC/TERB:DOTS E C/TERB:DOTS LENAME JJHayes* Tech Ed/MMejac* RABenedict* RLEmch* CLMiller*DATE 05/02/95 05/10/95 05/02/95 105/02/ 95 05/02/95.....-.IOFFICE1SC/OECB:DOPSIN IPECB:DRPMI E IC/PECB:DRPMI NID/DR~1X, I11NAME EFGoodwin* RKiessel* elDATE 05/15/95 1 3909/14/95 09 95UtiilLIAL K-IUKU WURY
Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Project Support Office of Nuclear Reactor Regulation


IN 95-xxSeptember xx, 995Exposure of charcoal to chemical compounds can result in a degradation of thecharcoal. With such degradation, in the event of an accident, the charcoalmay perform at an efficiency less than that assumed in the staff's safetyevaluation. Therefore, if licensees divert air flow through charcoal adsorbersin their ventilation systems during and/or following chemical cleaning, theymay find it appropriate to perform a laboratory test of the charcoal to ensurethat the charcoal has not degraded below its TS surveillance requirementslimit.This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation (NRR) project manager.Dennis M. Crutchfield, DirectorDivision of Reactor Program ManagementOffice of Nuclear Reactor RegulationTechnical contact: John J. Hayes, NRR(301) 415-3167Attachments:1. Referenced Codes and Standards2. List of Recently Issued NRC Information NoticesDOCUMENT NAME:S:\DRPM SEC\CHR91438*See previous concurrence-a_ An Ad_ try -.--- -ta~ rh otonlIF' .Cnnv with atnchmentlenclosure *N' -No copyTo receive a copy 0? this cocunwnt, Indicate mn Xn. o:A; -s&deg;Pqt wnn u--a........ o ---- -. -OFFICE TERB:DOTS IC ADM:[PUB NOECB:DOPS I E SC/TERB:DOTSI E IC/TRB:DOTSENAME JJHayes* Tech Ed/MMejac* RABenedict* RLEmch*DATE 05/02/95 105/10/95 105/02/95 05/02/95_ 05/02/9--.---r-I -I .I &Ii M fr~ .nnLAnFFT(F ISC/OECB!DOPSIN IPECH: URPMI t IL/ tLt1:UKrMI1 IU UKNrrI -11-- _, ___ .__.__ ..__ _ _ .__NAME EFGoodwin* I RKiessel* _AEChaffee* IDMCrutchfieldqIDATE 05/15/95 109/13/95 --9/1/95 099UOFICIIAL KLLUKU HUrY
Technical


IN 95-xxSeptember xx, 1995 Exposure of charcoal to chemical compounds can result in a degradation of thecharcoal. With such degradation, in the event of an accident, the charcoalmay perform at an efficiency less than that assumed in the staff's safetyevaluation. Therefore, if licensees divert air flow through charcoal adsorbersin their ventilation systems during and/or following chemical cleaning, theymay find it appropriate to perform a laboratory test of the charcoal to ensurethat the charcoal has not degraded below its TS surveillance requirementslimit.This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation (NRR) project manager.Dennis M. Crutchfield, DirectorDivision of Reactor Program ManagementOffice of Nuclear Reactor Regulation
Contact: John J. Hayes, NRR (301) 415-3167 Attachments:
1. Referenced


===Technical Contact:===
Codes and Standards 2. List of Recently Issued NRC Information
John J. Hayes, NRR(301) 415-3167Attachments:1. Referenced Codes and Standards2. List of Recently Issued NRC Information NoticesDOCUMENT NAME:G:\IN\CHR91438*See previous concurrence-- .-rt S. *" 11. b_-f -t -fthrA


* ttsdtmfilfntjnfLd E = COnY with =tachmerd/en e^suu. '' a No copyre lculy.
Notices DOCUMENT NAME: G:\IN\CHR91438 To rSceive a copy of this document, Indcate In the box: 'C' Copy without attachmenUt/enclosure


* wpy. u.l ocuun.... -.w --IIOFFICE TERB:DOTS lC ADM:PUB IN OECB:DOPS E E SC/TERB:DOTSI E C/NAME JJHayes* Tech Ed/MMejac* RABenedict* RLEmch* CLMiller*DATE 05/02/95 05/10/95 05/02/95 05/02/95 05/02/95.M. a.(FF FICSCIFECR:DOPSI N I PECB:DRPMI E I UPLUB; WPMIA/IUUKrfiI II I -I .-- .' -- 0 .... .... ... -,,, ...-NAME 1EFGoodwin* _RKiessel 42 AEChaffee _ DMCrutchfeld lDATE 105/15/95 109/J3 /95 1fj1 T 09/.5 /95 09/ /95^rIrY 0 TAiI nrffnn% n glfOFF lVlAL KcvuKu vuri
'E' -Copy with attachment/enclosure


IN 95-xxMay xx, 1995 Exposure of charcoal to chemical compounds can result in a degradation of thecharcoal. With such degradation, in the event of an accident, the charcoalmay perform at an efficiency less than that assumed in the staff's safetyevaluation. Therefore, if licensees divert air flow through charcoal adsorbersin their ventilation systems during and/or following chemical cleaning, theymay find it appropriate to perform a laboratory test of the charcoal to ensurethat the charcoal has not degraded below its TS surveillance requirementslimit.This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation (NRR) project manager.Brian K. Grimes, DirectorDivision of Project SupportOffice of Nuclear Reactor Regulation
'N'
* No conp OFFICE T TECH ED l OECB 14F 1 SC:TERB ,,Jir-C:TERB/DOTS


===Technical Contact:===
I Cl NAME ayes RABeneaict,'  
John J. Hayes, NRR(301) 415-3167Attachments:1. Referenced Codes and Standards2. List of Recently Issued NRC Information NoticesDOCUMENT NAME: G:\IN\CHR91438*See previous concurrenceTo receive a copy of this document, Indicate In the box: C" = Copy without attachmentlenclosure 'E' = Copy with attachment/enclosure ON' -No copyOFFICE TERB:DOTS C A M:PUB 1 N [OECB:DOPS E SC/TERB:DOTS lE C/TERB:DOTS K ENAME JJHayes* Tech Ed/MMejac* RABenedict* RLEmch* ICLMiller*DATE 05/02/95 05/10/95 105/02/95 105/02/95 05/02/95a AInFrTrr I SC/fECBRiOPSI N IOECB:DOPSI IM/utCu:VUVpI I uIuurP1 11-_ .--- -. -I- v .A _ .--NAME EFGoodwin* _ RKiessel IAEChaffee SUB BKGrimesDATE 05/15/95 05/ /95 05/ /95 105/ /95nrchIrTAI nrv'nnn fflV01-1-11,1AL KELUKU ,Ur 1 IN 95-xxMay xx, 1995 
RLEmch , CiMiller cog J llDATE OS/ V/95y V 05/ /95 05/oZ /95 05/2.? /95 05/ N-/95 SC:OECB/DOPS
-0 '"?;4 -Exposure of charcoal to chemical compounds can result in a degradation of thecharcoal. With such degradation, in the event of an accident, the charcoalmay perform at an efficiency less than that assumed in the staff's safetyevaluation. Therefore, if licensees divert air flow through charcoal adsorbersin their ventilation systems during and/or following chemical cleaning, theymay find it appropriate to perform a laboratory test of the charcoal to ensurethat the charcoal has not degraded below its TS surveillance requirementslimit.This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation (NRR) project manager.Brian K. Grimes, DirectorDivision of Project SupportOffice of Nuclear Reactor RegulationA -...-


===Technical Contact:===
I 1B:OECB/DOPS
John J. Hayes, NRR(301) 415-3167Attachments:1. Referenced Codes and Standards2. List of Recently Issued NRC Information NoticesDOCUMENT NAME:G:\IN\CHR91438*See previous concurrenceTo receive a copy of this document, Indicate In the box: "C' a Copy without attachmentenclosure "F = Copy with attachment/enclosure "N" -No copy-_ _ _ _ -_ .lOFFICE ITERB:DOTSICADM:PUBIOECB:DOPSI E ISC/TERB:DOTS I E IC/TER.B:DOTS I E 11NAME JJHayes* j ITech Ed 1 A!ndJRABenedict* IRLEmch* --_- CLMiller*DATE 105/02/95 105/1o /95 105/02/95 105/02/95 105/02/95A- -A _ A __OFFICE ISC/OECB:DOPSlC/OECB:DOPSID/DOPSI l1NAME EFGoodwin JAEChaffee BKGrimesDATE 05/ /95 105/ /95 05/ /95:.UIIILIAL KtLUKU COPY7,,, A; -..


K>~Exposure of charcoal to chemical compounds can result in a degradation of thecharcoal. With such degradation, in the event of an accident, the charcoalmay perform at an efficiency less than that assumed in the staff's safetyevaluation. Therefore, if licensees divert air flow through charcoal adsorbersin their ventilation systems during and/or following chemical cleaning, theymay find it appropriate to perform a laboratory test of the charcoal to ensurethat the charcoal has not degraded below its TS surveillance requirementslimit.This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactthe technical contact listed below or the appropriate Office of NuclearReactor Regulation (NRR) project manager.Brian K. Grimes, DirectorDivision of Project SupportOffice of Nuclear Reactor Regulation
I ID:DOPS I 1 EFGoodwin


===Technical Contact:===
AEChaffee
John J. Hayes, NRR(301) 415-3167Attachments:1. Referenced Codes and Standards2. List of Recently Issued NRC Information NoticesDOCUMENT NAME: G:\IN\CHR91438To rSceive a copy of this document, Indcate In the box: 'C' Copy without attachmenUt/enclosure 'E' -Copy with attachment/enclosure 'N'
* No conpOFFICE T TECH ED l OECB 14F 1 SC:TERB ,,Jir-C:TERB/DOTS I ClNAME ayes RABeneaict,' RLEmch , CiMiller cog J llDATE OS/ V/95y V 05/ /95 05/oZ /95 05/2.? /95 05/ N-/95SC:OECB/DOPSI 1B:OECB/DOPSI ID:DOPSI 1EFGoodwin AEChaffee BKGrimes05/ /95 05/ /95 05/ /95J


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

Revision as of 14:04, 31 August 2018

Degradation of Ventilation System Charcoal Resulting from Chemical Cleaning of Steam Generators
ML031060234
Person / Time
Site: Beaver Valley, Millstone, Hatch, Monticello, Calvert Cliffs, Dresden, Davis Besse, Peach Bottom, Browns Ferry, Salem, Oconee, Mcguire, Nine Mile Point, Palisades, Palo Verde, Perry, Indian Point, Fermi, Kewaunee, Catawba, Harris, Wolf Creek, Saint Lucie, Point Beach, Oyster Creek, Watts Bar, Hope Creek, Grand Gulf, Cooper, Sequoyah, Byron, Pilgrim, Arkansas Nuclear, Three Mile Island, Braidwood, Susquehanna, Summer, Prairie Island, Columbia, Seabrook, Brunswick, Surry, Limerick, North Anna, Turkey Point, River Bend, Vermont Yankee, Crystal River, Haddam Neck, Ginna, Diablo Canyon, Callaway, Vogtle, Waterford, Duane Arnold, Farley, Robinson, Clinton, South Texas, San Onofre, Cook, Comanche Peak, Yankee Rowe, Maine Yankee, Quad Cities, Humboldt Bay, La Crosse, Big Rock Point, Rancho Seco, Zion, Midland, Bellefonte, Fort Calhoun, FitzPatrick, McGuire, LaSalle, Fort Saint Vrain, Shoreham, Satsop, Trojan, Atlantic Nuclear Power Plant  Entergy icon.png
Issue date: 09/22/1995
From: Crutchfield D M
Office of Nuclear Reactor Regulation
To:
References
IN-95-041, NUDOCS 9509180341
Download: ML031060234 (12)
v • d • e


K9J(UNITED STATES NUCLEAR REGULATORY

COMMISSION

OFFICE OF NUCLEAR REACTOR REGULATION

WASHINGTON, D.C. 20555-0001 September

22, 1995 NRC INFORMATION

NOTICE 95-41: DEGRADATION

OF VENTILATION

SYSTEM CHARCOAL RESULTING

FROM CHEMICAL CLEANING OF STEAM GENERATORS

Addressees

All holders of operating

licenses or construction

permits for nuclear power reactors.

Purpose

The U.S. Nuclear Regulatory

Commission (NRC) is issuing this information

notice to alert addressees

to the potential

degradation

of ventilation

system charcoal as a result of the charcoal's

exposure to chemicals

during the chemical cleaning of steam generators.

It is expected that recipients

will review the information

for applicability

to their facilities

and consider actions, as appropriate, to avoid similar problems.

However, suggestions

contained

in this information

notice are not NRC requirements;

therefore, no specific action or written response is required.Description

of Circumstances

On June 5, 1994, a chemical cleaning of the secondary

sides of the steam generators

at Surry Unit 2 was begun. During this cleaning, containment

purge was established

using train A of the auxiliary

ventilation

system, which contains a safety-grade

charcoal adsorber.

The chemical cleaning process involves the--use of ethylene diamine tetraacetic

acid (EDTA) as the cleaning agent and of various other chemicals

such as ethylenediamine (EDA), hydrazine, ammonia, hydrogen peroxide, nitrogen, and CCl-801, a proprietary

corrosion inhibitor.

During the chemical cleaning the steam generators

were isolated from the containment

atmosphere

and force-vented

to the outdoor atmosphere

through the atmospheric

steam dump relief valves. The steam generators

were rinsed to remove residual chemicals.

After the rinse, the steam generators

were opened for sludge lancing of the tube sheet region.On June 16, 1994, a strong odor of ammonia was reported in the Unit 2 containment.

Concentrations

were measured at 30 ppm (parts per million)ammonia and 6 ppm hydrazine.

Consequently, personnel

were evacuated

from the containment.

At the time of the evacuation, the chemical cleaning and rinse had been completed

on steam generators

A and C and the steam generators

were vented to the containment.

Because of the elevated levels of hydrazine

and ammonia in the containment, train B of the auxiliary

ventilation

system was started to assist train A in reducing the airborne concentrations.

Both trains operated approximately

8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> until chemical concentrations

in the containment

were reduced.950918034 t~q~gut II @

IN 95-41 September

22, 1995 -As a result of the exposure of the charcoal to the chemicals, in accordance

with the technical

specifications (TS), a sample of train A charcoal was taken and a laboratory

test of a sample of the sample was performed.

The results of the laboratory

test showed a methyl iodide removal efficiency

of 93.4 percent, which was below the TS limit. The charcoal was replaced.

A sample from train B was tested and the results of the laboratory

test of that sample showed a methyl iodide removal efficiency

of 90.7 percent. This value was also below the TS limit, and the train B charcoal was replaced.The failure of these samples was a surprise to the licensee.

At the time the charcoal was determined

to have failed, train A had operated for 657 hours0.0076 days <br />0.183 hours <br />0.00109 weeks <br />2.499885e-4 months <br />, while the train B had operated for 360 hours0.00417 days <br />0.1 hours <br />5.952381e-4 weeks <br />1.3698e-4 months <br />. In addition, the licensee had held discussions

with the charcoal supplier during which the supplier had indicated

that exposure of the charcoal to hydrazine

and ammonia in the above noted concentrations

should not have resulted in its degradation.

As a result of the experience

at Unit 2, when the steam generators

at Unit 1 were chemically

cleaned, the licensee arranged for the containment

flow to be diverted to a non-safety-grade

system containing

charcoal.

When the licensee completed

the cleaning operation, laboratory

testing of the charcoal in the non-safety-grade

system showed that the adsorber efficiency

was 3.3 percent less than its efficiency

before the chemical cleaning.

On the basis of these two experiences, the licensee concluded

that discharging

the air involved in steam generator

cleaning operations

through systems containing

charcoal was likely to degrade the charcoal.The licensee's

laboratory

tests of the charcoal were performed

at 30C [86°F]and a relative humidity of 95 percent with a face velocity of 24.4 meters per minute [80 feet per minute]. The laboratory

tests were conducted

using the 1979 version of American Society for Testing and Materials (ASTM) D3803, Standard Test Method for Nuclear-Grade

Activated

Carbon.' The licensee did not attempt to determine

the chemical compound responsible

for the degradation

of the charcoal.

However, it and its charcoal supplier believe that the probable culprits were EDA and EDTA.The NRC staff held telephone

conversations

with charcoal suppliers

and testing laboratory

representatives.

Based upon these conversations, the parties concluded

that, although the ammonia did not contribute

to the degradation

of the charcoal, the breakdown

of hydrazine

in the charcoal may have contributed

additional

moisture to the charcoal resulting

in its degradation.

These discussions

also confirmed

that both EDA and EDTA could degrade the charcoal.

The staff also noted that, had the licensee performed the laboratory

tests in accordance

with the guidance in NRC Information

Notice 87-32, "Deficiencies

in the Testing of Nuclear-Grade

Activated

Charcoal," (Accession

No. 8707070003)

or in accordance

with the 1989 version of ASTM D3803, the measured degradation

of the charcoal would have been greater than that identified

by the licensee.

K..- V IN 95-41 September

22, 1995 Exposure of charcoal to chemical compounds

can result in its degradation.

With such degradation, in the event of an accident, the charcoal may perform at an efficiency

less than that assumed in the staff's safety evaluation.

Therefore, if licensees

divert air flow through charcoal adsorbers

in their ventilation

systems during and/or after chemical cleaning, they may find it appropriate

to perform a laboratory

test of the charcoal to ensure that the charcoal has not degraded below its TS surveillance

requirements

limit.This information

notice requires no specific action or written response.

If you have any questions

about the information

in this notice, please contact the technical

contact listed below or the appropriate

Office of Nuclear Reactor Regulation (NRR) project manager.'nn .1%ic I Division of Reactor Pr ram Management

Office of Nuclear Reactor Regulation

Technical

contact: John J. Hayes, NRR (301) 415-3167 Attachments:

1. Referenced

Codes and Standards 2. List of Recently Issued NRC Information

Notices A4e UQ FJLa

~1 <-J Attachment

1 IN 95-41 September

22, 1995 Referenced

Codes and Standards American Society for Testing and Materials, ASTM D3803, "Standard

Test Method for Nuclear-Grade

Activated

Carbon,' Philadelphia, Pennsylvania.

wXvachment

2 IN 95-41 September

22, 1995 LIST OF RECENTLY ISSUED NRC INFORMATION

NOTICES Information

Date of Notice No. Subject Issuance Issued to 95-40 95-39 95-38 95-37 Supplemental

Information

to Generic Letter 95-03,"Circumferential

Cracking of Steam Generator

Tubes" Brachytherapy

Incidents Involving

Treatment Planning Errors Degradation

of Boraflex Neutron Absorber in Spent Fuel Storage Racks Inadequate

Offsite Power System Voltages during Design-Basis

Events 09/20/95 09/19/95 09/08/95 09/07/95 All holders of OLs or CPs for nuclear power reactors.All U.S. Nuclear Regulatory

Commission

Medical Licensees.

All holders of OLs or CPs for nuclear power reactors.All holders of OLs or CPs for nuclear power reactors.95-36 Potential Post-Fire Lighting Problems with Emergency 08/29/95 All holders of OLs or CPs for nuclear power reactors.95-35 95-34 93-83, Supp. 1 95-33 Degraded Ability of Steam Generators

to Remove Decay Heat by Natural Circulation

Air Actuator and Supply Air Regulator

Problems in Copes-Vulcan

Pressurizer

Power-Operated

Relief Valves Potential

Loss of Spent Fuel Pool Cooling After a Loss-of-Coolant

Accident or a Loss of Offsite Power Switchgear

Fire and Partial Loss of Offsite Power at Waterford Generating

Station, Unit 3 08/28/95 08/25/95 08/24/95 08/23/95 All holders of OLs or CPs for pressurized

water reactors (PWRs).All holders of OLs or CPs for nuclear power reactors.All holders of OLs or CPs for nuclear power reactors.All holders of OLs or CPs for nuclear power reactors.I OL -Operating

License CP = Construction

Permit

K>IN 95-41 September

22, 1995 Exposure of charcoal to chemical compounds

can result in a degradation

of the charcoal.

With such degradation, in the event of an accident, the charcoal may perform at an efficiency

less than that assumed in the staff's safety evaluation.

Therefore, if licensees

divert air flow through charcoal adsorbers in their ventilation

systems during and/or following

chemical cleaning, they may find it appropriate

to perform a laboratory

test of the charcoal to ensure that the charcoal has not degraded below its TS surveillance

requirements

limit.This information

notice requires no specific action or written response.

If you have any questions

about the information

in this notice, please contact the technical

contact listed below or the appropriate

Office of Nuclear Reactor Regulation (NRR) project manager.orig /s/'d by DMCrutchfield

Dennis M. Crutchfield, Director Division of Reactor Program Management

Office of Nuclear Reactor Regulation

Technical

contact: John J. Hayes, NRR (301) 415-3167 Attachments:

1. Referenced

Codes and Standards 2. List of Recently Issued NRC Information

Notices DOCUMENT NAME: 95-41.IN*See previous concurrence

To receive a copy of this document, indicate In the box: C' = Copy without attachment/enclosure

'E' = Copy with attachmentlenclosure

'N' -No copy OFFICE TERB:DOTS

IC ADM:PUB IN OECB:DOPS

I E SC/TERB:DOTS

E C/TERB:DOTS

LE NAME JJHayes* Tech Ed/MMejac*

RABenedict*

RLEmch* CLMiller*DATE 05/02/95 05/10/95 05/02/95 105/02/ 95 05/02/95.....-.I OFFICE 1SC/OECB:DOPS

IN IPECB:DRPM

I E IC/PECB:DRPM

I NID/DR~1X, I 11 NAME EFGoodwin*

RKiessel*

el DATE 05/15/95 1 3909/14/95

09 95 UtiilLIAL

K-IUKU WURY

IN 95-xx September

xx, 1995 Exposure of charcoal to chemical compounds

can result in a degradation

of the charcoal.

With such degradation, in the event of an accident, the charcoal may perform at an efficiency

less than that assumed in the staff's safety evaluation.

Therefore, if licensees

divert air flow through charcoal adsorbers in their ventilation

systems during and/or following

chemical cleaning, they may find it appropriate

to perform a laboratory

test of the charcoal to ensure that the charcoal has not degraded below its TS surveillance

requirements

limit.This information

notice requires no specific action or written response.

If you have any questions

about the information

in this notice, please contact the technical

contact listed below or the appropriate

Office of Nuclear Reactor Regulation (NRR) project manager.Dennis M. Crutchfield, Director Division of Reactor Program Management

Office of Nuclear Reactor Regulation

Technical

contact: John J. Hayes, NRR (301) 415-3167 Attachments:

1. Referenced

Codes and Standards 2. List of Recently Issued NRC Information

Notices DOCUMENT NAME: S:\DRPM SEC\CHR91438

  • See previous concurrence

-a_ An Ad_ try -.--- -ta~ rh otonl IF' .Cnnv with atnchmentlenclosure

  • N' -No copy T o receive a copy 0? this cocunwnt, Indicate mn Xn. o:A; -s°Pqt wnn u--a........

o ---- -. -OFFICE TERB:DOTS

IC ADM:[PUB NOECB:DOPS

I E SC/TERB:DOTSI

E IC/TRB:DOTSE

NAME JJHayes* Tech Ed/MMejac*

RABenedict*

RLEmch*DATE 05/02/95 105/10/95

105/02/95

05/02/95_

05/02/9--.---r-I -I .I &Ii M fr~ .nnLA nFFT(F ISC/OECB!DOPS

IN IPECH: URPM I t IL/ tLt1:UKrM I1 IU UKNrr I -11-- _, ___ .__.__ ..__ _ _ .__NAME EFGoodwin*

I RKiessel*

_AEChaffee*

IDMCrutchfieldqI

DATE 05/15/95 109/13/95

--9/1/95 099 UOFICIIAL

KLLUKU HUrY

IN 95-xx September

xx, 1995 Exposure of charcoal to chemical compounds

can result in a degradation

of the charcoal.

With such degradation, in the event of an accident, the charcoal may perform at an efficiency

less than that assumed in the staff's safety evaluation.

Therefore, if licensees

divert air flow through charcoal adsorbers in their ventilation

systems during and/or following

chemical cleaning, they may find it appropriate

to perform a laboratory

test of the charcoal to ensure that the charcoal has not degraded below its TS surveillance

requirements

limit.This information

notice requires no specific action or written response.

If you have any questions

about the information

in this notice, please contact the technical

contact listed below or the appropriate

Office of Nuclear Reactor Regulation (NRR) project manager.Dennis M. Crutchfield, Director Division of Reactor Program Management

Office of Nuclear Reactor Regulation

Technical

Contact: John J. Hayes, NRR (301) 415-3167 Attachments:

1. Referenced

Codes and Standards 2. List of Recently Issued NRC Information

Notices DOCUMENT NAME: G:\IN\CHR91438

  • See previous concurrence

-- .-rt S. *" 11. b_-f -t -fthrA

  • ttsdtmfilfntjnfLd

E = COnY with =tachmerd/en

e^suu. a No copy re lculy.

  • wpy. u.l ocuun....

-.w --I I OFFICE TERB:DOTS

lC ADM:PUB IN OECB:DOPS

E E SC/TERB:DOTSI

E C/NAME JJHayes* Tech Ed/MMejac*

RABenedict*

RLEmch* CLMiller*DATE 05/02/95 05/10/95 05/02/95 05/02/95 05/02/95.M. a.(FF FIC SCIFECR:DOPS

I N I PECB:DRPM I E I UPLUB; WPM IA/IUUKrfi

I I I I -I .-- .' -- 0 .... .... ... -,,, ...-NAME 1EFGoodwin*

_RKiessel

42 AEChaffee

_ DMCrutchfeld

lDATE 105/15/95

109/J3 /95 1fj1 T 09/.5 /95 09/ /95^rIrY 0 TAiI nrffnn% n glf OFF lVlAL KcvuKu vuri

IN 95-xx May xx, 1995 Exposure of charcoal to chemical compounds

can result in a degradation

of the charcoal.

With such degradation, in the event of an accident, the charcoal may perform at an efficiency

less than that assumed in the staff's safety evaluation.

Therefore, if licensees

divert air flow through charcoal adsorbers in their ventilation

systems during and/or following

chemical cleaning, they may find it appropriate

to perform a laboratory

test of the charcoal to ensure that the charcoal has not degraded below its TS surveillance

requirements

limit.This information

notice requires no specific action or written response.

If you have any questions

about the information

in this notice, please contact the technical

contact listed below or the appropriate

Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Project Support Office of Nuclear Reactor Regulation

Technical

Contact: John J. Hayes, NRR (301) 415-3167 Attachments:

1. Referenced

Codes and Standards 2. List of Recently Issued NRC Information

Notices DOCUMENT NAME: G:\IN\CHR91438

  • See previous concurrence

To receive a copy of this document, Indicate In the box: C" = Copy without attachmentlenclosure

'E' = Copy with attachment/enclosure

ON' -No copy OFFICE TERB:DOTS

C A M:PUB 1 N [OECB:DOPS

E SC/TERB:DOTS

lE C/TERB:DOTS

K E NAME JJHayes* Tech Ed/MMejac*

RABenedict*

RLEmch* ICLMiller*

DATE 05/02/95 05/10/95 105/02/95

105/02/95

05/02/95 a AI nFrTrr I SC/fECBRiOPS

I N IOECB:DOPS

I IM/utCu:VUVp

I I uIuurP 1 11-_ .--- -. -I- v .A _ .--NAME EFGoodwin*

_ RKiessel IAEChaffee

SUB BKGrimes DATE 05/15/95 05/ /95 05/ /95 105/ /95 nrchIrTAI

nrv'nnn fflV 01-1-11,1AL

KELUKU ,Ur 1 IN 95-xx May xx, 1995 Exposure of charcoal to chemical compounds

can result in a degradation

of the charcoal.

With such degradation, in the event of an accident, the charcoal may perform at an efficiency

less than that assumed in the staff's safety evaluation.

Therefore, if licensees

divert air flow through charcoal adsorbers in their ventilation

systems during and/or following

chemical cleaning, they may find it appropriate

to perform a laboratory

test of the charcoal to ensure that the charcoal has not degraded below its TS surveillance

requirements

limit.This information

notice requires no specific action or written response.

If you have any questions

about the information

in this notice, please contact the technical

contact listed below or the appropriate

Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Project Support Office of Nuclear Reactor Regulation

Technical

Contact: John J. Hayes, NRR (301) 415-3167 Attachments:

1. Referenced

Codes and Standards 2. List of Recently Issued NRC Information

Notices DOCUMENT NAME: G:\IN\CHR91438

  • See previous concurrence

To receive a copy of this document, Indicate In the box: ACT -Copy without attachmentlenclosure

'E'

  • Copy with attachmentlenclosure

SNH -No copy OFFICE TERB:DOTS

IC ADM:PUB [ OECB:DOPS

I E SC/TERB:DOTS

I E C/TERB:DOTS

I E NAME JJHayes* Tech Ed/MMejac*

[RABenedict*

IRLEmch* CLMiller*DATE 05/02/95 05/10/95 105/02/95

05/02/95 05/02/95 IIOFFICE 1SC/OECB:DOPS

I I C/OECB:DOPS

I D/DOPS I 1I NAME EFGoodwin

X 1AEChaffee

% 5b I mKGriImes DATE 105/16E/9505/

/95 05/ /95 OFFICIAL RECORD COPY

-0 '"?;4 -Exposure of charcoal to chemical compounds

can result in a degradation

of the charcoal.

With such degradation, in the event of an accident, the charcoal may perform at an efficiency

less than that assumed in the staff's safety evaluation.

Therefore, if licensees

divert air flow through charcoal adsorbers in their ventilation

systems during and/or following

chemical cleaning, they may find it appropriate

to perform a laboratory

test of the charcoal to ensure that the charcoal has not degraded below its TS surveillance

requirements

limit.This information

notice requires no specific action or written response.

If you have any questions

about the information

in this notice, please contact the technical

contact listed below or the appropriate

Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Project Support Office of Nuclear Reactor Regulation

A -...-

Technical

Contact: John J. Hayes, NRR (301) 415-3167 Attachments:

1. Referenced

Codes and Standards 2. List of Recently Issued NRC Information

Notices DOCUMENT NAME: G:\IN\CHR91438

  • See previous concurrence

To receive a copy of this document, Indicate In the box: "C' a Copy without attachmentenclosure "F = Copy with attachment/enclosure "N" -No copy-_ _ _ _ -_ .l OFFICE ITERB:DOTS

IC ADM:PUB I OECB:DOPS I E ISC/TERB:DOTS

I E IC/TER.B:DOTS

I E 11 NAME JJHayes* j ITech Ed 1 A!ndJRABenedict*

IRLEmch* --_- CLMiller*DATE 105/02/95

105/1o /95 105/02/95

105/02/95

105/02/95 A- -A _ A __OFFICE ISC/OECB:DOPS

l C/OECB:DOPS

I D/DOPS I l1 NAME EFGoodwin

JAEChaffee

BKGrimes DATE 05/ /95 105/ /95 05/ /95:.UIIILIAL KtLUKU COPY 7,,, A; -..

K>~Exposure of charcoal to chemical compounds

can result in a degradation

of the charcoal.

With such degradation, in the event of an accident, the charcoal may perform at an efficiency

less than that assumed in the staff's safety evaluation.

Therefore, if licensees

divert air flow through charcoal adsorbers in their ventilation

systems during and/or following

chemical cleaning, they may find it appropriate

to perform a laboratory

test of the charcoal to ensure that the charcoal has not degraded below its TS surveillance

requirements

limit.This information

notice requires no specific action or written response.

If you have any questions

about the information

in this notice, please contact the technical

contact listed below or the appropriate

Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Project Support Office of Nuclear Reactor Regulation

Technical

Contact: John J. Hayes, NRR (301) 415-3167 Attachments:

1. Referenced

Codes and Standards 2. List of Recently Issued NRC Information

Notices DOCUMENT NAME: G:\IN\CHR91438 To rSceive a copy of this document, Indcate In the box: 'C' Copy without attachmenUt/enclosure

'E' -Copy with attachment/enclosure

'N'

  • No conp OFFICE T TECH ED l OECB 14F 1 SC:TERB ,,Jir-C:TERB/DOTS

I Cl NAME ayes RABeneaict,'

RLEmch , CiMiller cog J llDATE OS/ V/95y V 05/ /95 05/oZ /95 05/2.? /95 05/ N-/95 SC:OECB/DOPS

I 1B:OECB/DOPS

I ID:DOPS I 1 EFGoodwin

AEChaffee

BKGrimes 05/ /95 05/ /95 05/ /95 J


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