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 STATES NUCLEAR REGULATORY
{{#Wiki_filter:K9J(
                                  UNITED STATES


COMMISSION
NUCLEAR REGULATORY COMMISSION


===OFFICE OF NUCLEAR REACTOR REGULATION===
OFFICE OF NUCLEAR REACTOR REGULATION
WASHINGTON, D.C. 20555-0001 September


22, 1995 NRC INFORMATION
WASHINGTON, D.C. 20555-0001 September 22, 1995 NRC INFORMATION NOTICE 95-41:  DEGRADATION OF VENTILATION SYSTEM CHARCOAL


NOTICE 95-41: DEGRADATION
RESULTING FROM CHEMICAL CLEANING OF STEAM


OF VENTILATION
GENERATORS
 
SYSTEM CHARCOAL RESULTING
 
===FROM CHEMICAL CLEANING OF STEAM GENERATORS===


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


permits for nuclear power reactors.
reactors.


==Purpose==
==Purpose==
The U.S. Nuclear Regulatory
The U.S. Nuclear Regulatory Commission (NRC) is issuing this information


Commission (NRC) is issuing this information
notice to alert addressees to the potential degradation of ventilation system


notice to alert addressees
charcoal as a result of the charcoal's exposure to chemicals during the


to the potential
chemical cleaning of steam generators. It is expected that recipients will


degradation
review the information for applicability to their facilities and consider


of ventilation
actions, as appropriate, to avoid similar problems. However, suggestions


system charcoal as a result of the charcoal's
contained in this information notice are not NRC requirements; therefore, no


exposure to chemicals
specific action or written response is required.


during the chemical cleaning of steam generators.
==Description of Circumstances==
On June 5, 1994, a chemical cleaning of the secondary sides of the steam


It is expected that recipients
generators at Surry Unit 2 was begun. During this cleaning, containment purge


will review the information
was established using train A of the auxiliary ventilation system, which


for applicability
contains a safety-grade charcoal adsorber. The chemical cleaning process


to their facilities
involves the--use of ethylene diamine tetraacetic acid (EDTA) as the cleaning


and consider actions, as appropriate, to avoid similar problems.
agent and of various other chemicals such as ethylenediamine (EDA), hydrazine, ammonia, hydrogen peroxide, nitrogen, and CCl-801, a proprietary corrosion


===However, suggestions===
inhibitor. During the chemical cleaning the steam generators were isolated
contained


in this information
from the containment atmosphere and force-vented to the outdoor atmosphere


notice are not NRC requirements;
through the atmospheric steam dump relief valves. The steam generators were
therefore, no specific action or written response is required.Description


of Circumstances
rinsed to remove residual chemicals. After the rinse, the steam generators


On June 5, 1994, a chemical cleaning of the secondary
were opened for sludge lancing of the tube sheet region.


sides of the steam generators
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


at Surry Unit 2 was begun. During this cleaning, containment
containment. At the time of the evacuation, the chemical cleaning and rinse


purge was established
had been completed on steam generators A and C and the steam generators were


using train A of the auxiliary
vented to the containment. Because of the elevated levels of hydrazine and


ventilation
ammonia in the containment, train B of the auxiliary ventilation system was


system, which contains a safety-grade
started to assist train A in reducing the airborne concentrations.      Both


charcoal adsorber.
trains  operated approximately 8  hours until  chemical concentrations in the


The chemical cleaning process involves the--use of ethylene diamine tetraacetic
containment were reduced.


acid (EDTA) as the cleaning agent and of various other chemicals
950918034 t~q~gut                                                II


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


corrosion inhibitor.
IN 95-41 September 22, 1995 -
As a result of the exposure of the charcoal to the chemicals, in accordance


During the chemical cleaning the steam generators
with the technical specifications (TS), a sample of train A charcoal was taken


were isolated from the containment
and a laboratory test of a sample of the sample was performed. The results of


atmosphere
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


and force-vented
train B was tested and the results of the laboratory test of that sample


to the outdoor atmosphere
showed a methyl iodide removal efficiency of 90.7 percent. This value was


through the atmospheric
also below the TS limit, and the train B charcoal was replaced.


steam dump relief valves. The steam generators
The failure of these samples was a surprise to the licensee. At the time the


were rinsed to remove residual chemicals.
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


===After the rinse, the steam generators===
held discussions with the charcoal supplier during which the supplier had
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
indicated that exposure of the charcoal to hydrazine and ammonia in the above


were measured at 30 ppm (parts per million)ammonia and 6 ppm hydrazine.
noted concentrations should not have resulted in its degradation.


Consequently, personnel
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


were evacuated
diverted to a non-safety-grade system containing charcoal. When the licensee


from the containment.
completed the cleaning operation, laboratory testing of the charcoal in the


At the time of the evacuation, the chemical cleaning and rinse had been completed
non-safety-grade system showed that the adsorber efficiency was 3.3 percent


on steam generators
less than its efficiency before the chemical cleaning. On the basis of these


A and C and the steam generators
two experiences, the licensee concluded that discharging the air involved in


were vented to the containment.
steam generator cleaning operations through systems containing charcoal was


Because of the elevated levels of hydrazine
likely to degrade the charcoal.


and ammonia in the containment, train B of the auxiliary
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


ventilation
minute [80 feet per minute]. The laboratory tests were conducted using the


system was started to assist train A in reducing the airborne concentrations.
1979 version of American Society for Testing and Materials (ASTM) D3803, Standard Test Method for Nuclear-Grade Activated Carbon.' The licensee did


Both trains operated approximately
not attempt to determine the chemical compound responsible for the degradation


8 hours until chemical concentrations
of the charcoal. However, it and its charcoal supplier believe that the


in the containment
probable culprits were EDA and EDTA.


were reduced.950918034 t~q~gut II @
The NRC staff held telephone conversations with charcoal suppliers and
IN 95-41 September


22, 1995 -As a result of the exposure of the charcoal to the chemicals, in accordance
testing laboratory representatives. Based upon these conversations, the


with the technical
parties concluded that, although the ammonia did not contribute to the


specifications (TS), a sample of train A charcoal was taken and a laboratory
degradation of the charcoal, the breakdown of hydrazine in the charcoal may


test of a sample of the sample was performed.
have contributed additional moisture to the charcoal resulting in its


The results of the laboratory
degradation. These discussions also confirmed that both EDA and EDTA could


test showed a methyl iodide removal efficiency
degrade the charcoal. The staff also noted that, had the licensee performed


of 93.4 percent, which was below the TS limit. The charcoal was replaced.
the laboratory tests in accordance with the guidance in NRC Information Notice


A sample from train B was tested and the results of the laboratory
87-32, "Deficiencies in the Testing of Nuclear-Grade Activated Charcoal,"
(Accession No. 8707070003) or in accordance with the 1989 version of ASTM


test of that sample showed a methyl iodide removal efficiency
D3803, the measured degradation of the charcoal would have been greater than


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.
that identified by the licensee.


At the time the charcoal was determined
K..-                              V    IN 95-41 September 22, 1995 its degradation.


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
Exposure of charcoal to chemical compounds can result incharcoal may perform


with the charcoal supplier during which the supplier had indicated
With such degradation, in the event of an accident,  the


that exposure of the charcoal to hydrazine
evaluation.


and ammonia in the above noted concentrations
at an efficiency less than that assumed in the staff's safety


should not have resulted in its degradation.
adsorbers    in their


As a result of the experience
Therefore, if licensees divert air flow through  charcoal


at Unit 2, when the steam generators
cleaning,   they  may  find it


at Unit 1 were chemically
ventilation systems during and/or after chemical              ensure  that  the


cleaned, the licensee arranged for the containment
to


flow to be diverted to a non-safety-grade
appropriate to perform a laboratory test of the charcoal            limit.


system containing
charcoal has not degraded below its TS surveillance  requirements


charcoal.
response. If


When the licensee completed
This information notice requires no specific action or writtenplease contact


the cleaning operation, laboratory
you have any questions about the information in  this  notice, of Nuclear


testing of the charcoal in the non-safety-grade
the technical contact listed below or the appropriate Office


system showed that the adsorber efficiency
Reactor Regulation (NRR) project manager.


was 3.3 percent less than its efficiency
'nn.1%ic            I


before the chemical cleaning.
Division of Reactor Pr ram Management


On the basis of these two experiences, the licensee concluded
Office of Nuclear Reactor Regulation


that discharging
Technical contact: John J. Hayes, NRR


the air involved in steam generator
(301) 415-3167 Attachments:
1. Referenced Codes and Standards


cleaning operations
2. List of Recently Issued NRC Information Notices


through systems containing
A4e                  UQ            FJLa


charcoal was likely to degrade the charcoal.The licensee's
~1                                <-J Attachment 1 IN 95-41 September 22, 1995 Referenced Codes and Standards


laboratory
"Standard Test Method


tests of the charcoal were performed
American Society for Testing and Materials, ASTM D3803, Pennsylvania.


at 30C [86&deg;F]and a relative humidity of 95 percent with a face velocity of 24.4 meters per minute [80 feet per minute]. The laboratory
for Nuclear-Grade Activated Carbon,' Philadelphia,


tests were conducted
wXvachment 2 IN 95-41 September 22, 1995 LIST OF RECENTLY ISSUED


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


Activated
Information                                  Date of


Carbon.' The licensee did not attempt to determine
Notice No.             Subject                Issuance    Issued to


the chemical compound responsible
95-40          Supplemental Information      09/20/95    All holders of OLs or CPs


for the degradation
to Generic Letter 95-03,                  for nuclear power reactors.


of the charcoal.
"Circumferential Cracking


However, it and its charcoal supplier believe that the probable culprits were EDA and EDTA.The NRC staff held telephone
of Steam Generator Tubes"
95-39          Brachytherapy Incidents      09/19/95    All U.S. Nuclear Regulatory


conversations
Involving Treatment                      Commission Medical


with charcoal suppliers
Planning Errors                          Licensees.


and testing laboratory
95-38          Degradation of Boraflex      09/08/95    All holders of OLs or CPs


representatives.
Neutron Absorber in                      for nuclear power reactors.


Based upon these conversations, the parties concluded
Spent Fuel Storage Racks


that, although the ammonia did not contribute
95-37          Inadequate Offsite Power      09/07/95    All holders of OLs or CPs


to the degradation
System Voltages during                    for nuclear power reactors.


of the charcoal, the breakdown
Design-Basis Events


of hydrazine
95-36          Potential Problems with      08/29/95    All holders of OLs or CPs


in the charcoal may have contributed
Post-Fire Emergency                      for nuclear power reactors.


additional
Lighting


moisture to the charcoal resulting
95-35          Degraded Ability of          08/28/95    All holders of OLs or CPs


in its degradation.
Steam Generators to                      for pressurized water


These discussions
Remove Decay Heat by                      reactors (PWRs).


also confirmed
Natural Circulation


that both EDA and EDTA could degrade the charcoal.
95-34          Air Actuator and Supply      08/25/95    All holders of OLs or CPs


The staff also noted that, had the licensee performed the laboratory
Air Regulator Problems in                for nuclear power reactors.


tests in accordance
Copes-Vulcan Pressurizer


with the guidance in NRC Information
Power-Operated Relief Valves


Notice 87-32, "Deficiencies
93-83,         Potential Loss of Spent      08/24/95    All holders of OLs or CPs


in the Testing of Nuclear-Grade
Supp. 1        Fuel Pool Cooling After a                for nuclear power reactors.


Activated
Loss-of-Coolant Accident


Charcoal," (Accession
or a Loss of Offsite Power


No. 8707070003)
95-33          Switchgear Fire and          08/23/95    All holders of OLs or CPs
or in accordance


with the 1989 version of ASTM D3803, the measured degradation
Partial Loss of Offsite                  for nuclear power reactors.


of the charcoal would have been greater than that identified
Power at Waterford


by the licensee.
Generating Station, Unit 3 I


K..- V IN 95-41 September
OL - Operating License


22, 1995 Exposure of charcoal to chemical compounds
CP = Construction Permit


can result in its degradation.
K>                                                              IN 95-41 September 22, 1995 Exposure of charcoal to chemical compounds can result in a degradation of the


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


less than that assumed in the staff's safety evaluation.
may perform at an efficiency less than that assumed in the staff's safety


Therefore, if licensees
evaluation. Therefore, if licensees divert air flow through charcoal adsorbers


divert air flow through charcoal adsorbers
in their ventilation systems during and/or following chemical cleaning, they


in their ventilation
may find it appropriate to perform a laboratory test of the charcoal to ensure


systems during and/or after chemical cleaning, they may find it appropriate
that the charcoal has not degraded below its TS surveillance requirements


to perform a laboratory
limit.


test of the charcoal to ensure that the charcoal has not degraded below its TS surveillance
This information notice requires no specific action or written response. If


requirements
you have any questions about the information in this notice, please contact


limit.This information
the technical contact listed below or the appropriate Office of Nuclear


notice requires no specific action or written response.
Reactor Regulation (NRR) project manager.


If you have any questions
orig /s/'d by DMCrutchfield


about the information
Dennis M. Crutchfield, Director


in this notice, please contact the technical
Division of Reactor Program Management


contact listed below or the appropriate
Office of Nuclear Reactor Regulation


Office of Nuclear Reactor Regulation (NRR) project manager.'nn .1%ic I Division of Reactor Pr ram Management
Technical contact:                  John J. Hayes, NRR


===Office of Nuclear Reactor Regulation===
(301) 415-3167 Attachments:
Technical
                1. Referenced Codes and Standards


contact: John J. Hayes, NRR (301) 415-3167 Attachments:
2. List of Recently Issued NRC Information Notices
1. Referenced


Codes and Standards 2. List of Recently Issued NRC Information
DOCUMENT NAME:              95-41.IN


Notices A4e UQ FJLa
*See previous concurrence
 
~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
To receive a copy of this document, indicate In the box: C' = Copy without attachment/enclosure 'E' = Copy with attachmentlenclosure  'N' - No copy


IN 95-xx September
OFFICE        TERB:DOTS                  IC ADM:PUB              IN OECB:DOPS                  I E SC/TERB:DOTS              E C/TERB:DOTS LE


xx, 1995 Exposure of charcoal to chemical compounds
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


can result in a degradation
OFFICE        1SC/OECB:DOPS                IN IPECB:DRPM            I E IC/PECB:DRPM            INID/DR~1X, I 11 NAME            EFGoodwin*                        RKiessel*                                                            el


of the charcoal.
DATE            05/15/95                        1    3909/14/95                                      09          95 UtiilLIAL K-IUKU          WURY


With such degradation, in the event of an accident, the charcoal may perform at an efficiency
IN 95-xx


less than that assumed in the staff's safety evaluation.
September xx, 1995 Exposure of charcoal to chemical compounds can result in a degradation of the


Therefore, if licensees
charcoal. With such degradation, in the event of an accident, the charcoal


divert air flow through charcoal adsorbers in their ventilation
may perform at an efficiency less than that assumed in the staff's safety


systems during and/or following
evaluation. Therefore, if licensees divert air flow through charcoal adsorbers


chemical cleaning, they may find it appropriate
in their ventilation systems during and/or following chemical cleaning, they


to perform a laboratory
may find it appropriate to perform a laboratory test of the charcoal to ensure


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


requirements
limit.


limit.This information
This information notice requires no specific action or written response. If


notice requires no specific action or written response.
you have any questions about the information in this notice, please contact


If you have any questions
the technical contact listed below or the appropriate Office of Nuclear


about the information
Reactor Regulation (NRR) project manager.


in this notice, please contact the technical
Dennis M. Crutchfield, Director


contact listed below or the appropriate
Division of Reactor Program Management


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


===Office of Nuclear Reactor Regulation===
Technical contact:                    John J. Hayes, NRR
Technical


contact: John J. Hayes, NRR (301) 415-3167 Attachments:
(301) 415-3167 Attachments:
1. Referenced
                1. Referenced Codes and Standards


Codes and Standards 2. List of Recently Issued NRC Information
2. List of Recently Issued NRC Information Notices


Notices DOCUMENT NAME: S:\DRPM SEC\CHR91438
DOCUMENT NAME:               S:\DRPM SEC\CHR91438
*See previous concurrence
*See previous concurrence


-a_ An Ad_ try -.--- -ta~ rh otonl IF' .Cnnv with atnchmentlenclosure
- a copy                                    Ad_ try
 
*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
a_An- .---     -ta~              rh otonl        IF'  . Cnnv with atnchmentlenclosure  *N' - No copy


IC ADM:[PUB NOECB:DOPS
T o receive        0? this cocunwnt, Indicate mnXn. o:A;      -  s&deg;Pqt


I E SC/TERB:DOTSI
wnn u--a........                        o            ----                  -
  OFFICE          TERB:DOTS                  IC ADM:[PUB                    NOECB:DOPS              IE SC/TERB:DOTSI E IC/TRB:DOTSE


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
                          -                        rI


NAME JJHayes* Tech Ed/MMejac*
-.---                         -I           .     I         .nnLA
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*
&Ii M fr~
I RKiessel*
                                                                                                    I1 IU UKNrr
_AEChaffee*


===IDMCrutchfieldqI===
nFFT(F
DATE 05/15/95 109/13/95
--9/1/95 099 UOFICIIAL


KLLUKU HUrY
--            ISC/OECB!DOPS


IN 95-xx September
_, ___ .__.__              IN


xx, 1995 Exposure of charcoal to chemical compounds
. .IPECH:__      URPM


can result in a degradation
.___ _    I t IL/ tLt1:UKrM                                  I -11 NAME            EFGoodwin*                          IRKiessel*            _AEChaffee*                  IDMCrutchfieldqI


of the charcoal.
DATE            05/15/95                          109/13/95 -                -9/1/95                  099 UOFICIIAL KLLUKU      HUrY


With such degradation, in the event of an accident, the charcoal may perform at an efficiency
IN 95-xx


less than that assumed in the staff's safety evaluation.
September xx, 1995 Exposure of charcoal to chemical compounds can result in a degradation of the


Therefore, if licensees
charcoal. With such degradation, in the event of an accident, the charcoal


divert air flow through charcoal adsorbers in their ventilation
may perform at an efficiency less than that assumed in the staff's safety


systems during and/or following
evaluation. Therefore, if licensees divert air flow through charcoal adsorbers


chemical cleaning, they may find it appropriate
in their ventilation systems during and/or following chemical cleaning, they


to perform a laboratory
may find it appropriate to perform a laboratory test of the charcoal to ensure


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


requirements
limit.


limit.This information
This information notice requires no specific action or written response. If


notice requires no specific action or written response.
you have any questions about the information in this notice, please contact


If you have any questions
the technical contact listed below or the appropriate Office of Nuclear


about the information
Reactor Regulation (NRR) project manager.


in this notice, please contact the technical
Dennis M. Crutchfield, Director


contact listed below or the appropriate
Division of Reactor Program Management


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


===Office of Nuclear Reactor Regulation===
===Technical Contact:===
Technical


Contact: John J. Hayes, NRR (301) 415-3167 Attachments:
===John J. Hayes, NRR===
1. Referenced
                                          (301) 415-3167 Attachments:
              1. Referenced Codes and Standards


Codes and Standards 2. List of Recently Issued NRC Information
2. List of Recently Issued NRC Information Notices


Notices DOCUMENT NAME: G:\IN\CHR91438
DOCUMENT NAME:           G:\IN\CHR91438
*See previous concurrence
*See previous concurrence


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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
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OFFICE          TERB:DOTS      lC ADM:PUB                    IN OECB:DOPS                  EE SC/TERB:DOTSI E C/
                                          Tech Ed/MMejac* RABenedict*                              RLEmch*                  CLMiller*
I


_ DMCrutchfeld
NAME              JJHayes*
  DATE              05/02/95              05/10/95                      05/02/95                  05/02/95                  05/02/95
                                                                .                          M.                          a.


lDATE 105/15/95
(FF FIC          SCIFECR:DOPS  I N IPECB:DRPM                I EI UPLUB; WPM IA/IUUKrfi                              I I
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
I .-- .-    I          .  .  ' --
                                      .. 0 .      ...            ...            ,,,       -    ..  .                      -
  NAME            1EFGoodwin*        _RKiessel 42                        AEChaffee          _ DMCrutchfeld                l


can result in a degradation
DATE            105/15/95              109/J3 /95              T 09/.5 1fj1 /95                09/        /95
                                                        ^rIrY0 TAiI        nrffnn% n glf


of the charcoal.
OFF lVlAL KcvuKu vuri


With such degradation, in the event of an accident, the charcoal may perform at an efficiency
IN 95-xx


less than that assumed in the staff's safety evaluation.
May xx, 1995 Exposure of charcoal to chemical compounds can result in a degradation of the


Therefore, if licensees
charcoal. With such degradation, in the event of an accident, the charcoal


divert air flow through charcoal adsorbers in their ventilation
may perform at an efficiency less than that assumed in the staff's safety


systems during and/or following
evaluation. Therefore, if licensees divert air flow through charcoal adsorbers


chemical cleaning, they may find it appropriate
in their ventilation systems during and/or following chemical cleaning, they


to perform a laboratory
may find it appropriate to perform a laboratory test of the charcoal to ensure


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


requirements
limit.


limit.This information
This information notice requires no specific action or written response. If


notice requires no specific action or written response.
you have any questions about the information in this notice, please contact


If you have any questions
the technical contact listed below or the appropriate Office of Nuclear


about the information
Reactor Regulation (NRR) project manager.


in this notice, please contact the technical
Brian K. Grimes, Director


contact listed below or the appropriate
Division of Project Support


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


Technical
===Technical Contact:===


Contact: John J. Hayes, NRR (301) 415-3167 Attachments:
===John J. Hayes, NRR===
1. Referenced
                                                    (301) 415-3167 Attachments:
              1. Referenced Codes and Standards


Codes and Standards 2. List of Recently Issued NRC Information
2. List of Recently Issued NRC Information Notices


Notices DOCUMENT NAME: G:\IN\CHR91438
DOCUMENT NAME:               G:\IN\CHR91438
*See previous concurrence
*See previous concurrence


To receive a copy of this document, Indicate In the box: C" = Copy without attachmentlenclosure
C" = Copy without attachmentlenclosure   'E' = Copy with attachment/enclosure  ON' - No copy


'E' = Copy with attachment/enclosure
To receive a copy of this document, Indicate In the box:
                                                C A M:PUB 1 N [OECB:DOPS                              E SC/TERB:DOTS                  C/TERB:DOTS lE KE


ON' -No copy OFFICE TERB:DOTS
OFFICE         TERB:DOTS


C A M:PUB 1 N [OECB:DOPS
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


E SC/TERB:DOTS
nFrTrr


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-    . - _
                ISC/fECBRiOPS-
                    --  v    -.. A          I


K E NAME JJHayes* Tech Ed/MMejac*
I- N IOECB:DOPS
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 NAME            EFGoodwin*              _        RKiessel                  IAEChaffee SUB BKGrimes


I IM/utCu:VUVp
DATE          05/15/95                          05/    /95              05/ /95                    105/ /95 nrchIrTAI      nrv'nnn    fflV


I I uIuurP 1 11-_ .--- -. -I- v .A _ .--NAME EFGoodwin*
01-1-11,1AL    KELUKU      ,Ur  1
_ RKiessel IAEChaffee


SUB BKGrimes DATE 05/15/95 05/ /95 05/ /95 105/ /95 nrchIrTAI
IN 95-xx


nrv'nnn fflV 01-1-11,1AL
May xx, 1995 Exposure of charcoal to chemical compounds can result in a degradation of the


KELUKU ,Ur 1 IN 95-xx May xx, 1995 Exposure of charcoal to chemical compounds
charcoal. With such degradation, in the event of an accident, the charcoal


can result in a degradation
may perform at an efficiency less than that assumed in the staff's safety


of the charcoal.
evaluation. Therefore, if licensees divert air flow through charcoal adsorbers


With such degradation, in the event of an accident, the charcoal may perform at an efficiency
in their ventilation systems during and/or following chemical cleaning, they


less than that assumed in the staff's safety evaluation.
may find it appropriate to perform a laboratory test of the charcoal to ensure


Therefore, if licensees
that the charcoal has not degraded below its TS surveillance requirements


divert air flow through charcoal adsorbers in their ventilation
limit.


systems during and/or following
This information notice requires no specific action or written response. If


chemical cleaning, they may find it appropriate
you have any questions about the information in this notice, please contact


to perform a laboratory
the technical contact listed below or the appropriate Office of Nuclear


test of the charcoal to ensure that the charcoal has not degraded below its TS surveillance
Reactor Regulation (NRR) project manager.


requirements
Brian K. Grimes, Director


limit.This information
Division of Project Support


notice requires no specific action or written response.
Office of Nuclear Reactor Regulation


If you have any questions
===Technical Contact:===


about the information
===John J. Hayes, NRR===
                                                    (301) 415-3167 Attachments:
              1. Referenced Codes and Standards


in this notice, please contact the technical
2. List of Recently Issued NRC Information Notices


contact listed below or the appropriate
DOCUMENT NAME:               G:\IN\CHR91438
 
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
*See previous concurrence


To receive a copy of this document, Indicate In the box: ACT -Copy without attachmentlenclosure
To receive a copy of this document, Indicate In the box: ACT - Copy without attachmentlenclosure 'E'
 
* Copy with attachmentlenclosure SNH- No copy
'E'
* Copy with attachmentlenclosure
 
SNH -No copy OFFICE TERB:DOTS


IC ADM:PUB [ OECB:DOPS
OFFICE          TERB:DOTS                  IC ADM:PUB                     [OECB:DOPS             IE SC/TERB:DOTS IE C/TERB:DOTS I E


I E SC/TERB:DOTS
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     IC/OECB:DOPS I              D/DOPS              I 1I


I E C/TERB:DOTS
NAME            EFGoodwin                X      1AEChaffee            5b


I E NAME JJHayes* Tech Ed/MMejac*
% I             mKGriImes
[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
DATE          105/16E/9505/ /95                                              05/      /95 OFFICIAL RECORD COPY


I D/DOPS I 1I NAME EFGoodwin
-0 '"?;4    -
                                                                                                                                                          A    - ..


X 1AEChaffee
Exposure of charcoal to chemical compounds can result in a degradation of the                                                              .-14-.,-I.


% 5b I mKGriImes DATE 105/16E/9505/
charcoal. With such degradation, in the event of an accident, the charcoal
/95 05/ /95 OFFICIAL RECORD COPY


-0 '"?;4 -Exposure of charcoal to chemical compounds
may perform at an efficiency less than that assumed in the staff's safety


can result in a degradation
evaluation. Therefore, if licensees divert air flow through charcoal adsorbers


of the charcoal.
in their ventilation systems during and/or following chemical cleaning, they


With such degradation, in the event of an accident, the charcoal may perform at an efficiency
may find it appropriate to perform a laboratory test of the charcoal to ensure


less than that assumed in the staff's safety evaluation.
that the charcoal has not degraded below its TS surveillance requirements


Therefore, if licensees
limit.


divert air flow through charcoal adsorbers in their ventilation
This information notice requires no specific action or written response. If


systems during and/or following
you have any questions about the information in this notice, please contact


chemical cleaning, they may find it appropriate
the technical contact listed below or the appropriate Office of Nuclear


to perform a laboratory
Reactor Regulation (NRR) project manager.


test of the charcoal to ensure that the charcoal has not degraded below its TS surveillance
Brian K. Grimes, Director


requirements
Division of Project Support


limit.This information
Office of Nuclear Reactor Regulation


notice requires no specific action or written response.
===Technical Contact:===


If you have any questions
===John J. Hayes, NRR===
                                                    (301) 415-3167 Attachments:
              1. Referenced Codes and Standards


about the information
2. List of Recently Issued NRC Information Notices


in this notice, please contact the technical
DOCUMENT NAME:               G:\IN\CHR91438
 
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
*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
To receive a copy of this document, Indicate In the box: "C'a Copy without attachmentenclosure "F = Copy with attachment/enclosure "N"- No copy
 
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
l  - _ _ _ -        _      _.


of the charcoal.
OFFICE      ITERB:DOTS                  IC ADM:PUB                  I OECB:DOPS                I E ISC/TERB:DOTS IE 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                                                        :.


With such degradation, in the event of an accident, the charcoal may perform at an efficiency
NAME          EFGoodwin                    JAEChaffee                        BKGrimes


less than that assumed in the staff's safety evaluation.
DATE          05/        /95                  105/ /95                      05/      /95 UIIILIAL KtLUKU COPY


Therefore, if licensees
7,,,A;-    ..


divert air flow through charcoal adsorbers in their ventilation
K>~
                Exposure of charcoal to chemical compounds can result in a degradation of the


systems during and/or following
charcoal. With such degradation, in the event of an accident, the charcoal


chemical cleaning, they may find it appropriate
may perform at an efficiency less than that assumed in the staff's safety


to perform a laboratory
evaluation. Therefore, if licensees divert air flow through charcoal adsorbers


test of the charcoal to ensure that the charcoal has not degraded below its TS surveillance
in their ventilation systems during and/or following chemical cleaning, they


requirements
may find it appropriate to perform a laboratory test of the charcoal to ensure


limit.This information
that the charcoal has not degraded below its TS surveillance requirements


notice requires no specific action or written response.
limit.


If you have any questions
This information notice requires no specific action or written response. If


about the information
you have any questions about the information in this notice, please contact


in this notice, please contact the technical
the technical contact listed below or the appropriate Office of Nuclear


contact listed below or the appropriate
Reactor Regulation (NRR) project manager.


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


Technical
Division of Project Support


Contact: John J. Hayes, NRR (301) 415-3167 Attachments:
Office of Nuclear Reactor Regulation
1. Referenced


Codes and Standards 2. List of Recently Issued NRC Information
===Technical Contact:===


Notices DOCUMENT NAME: G:\IN\CHR91438 To rSceive a copy of this document, Indcate In the box: 'C' Copy without attachmenUt/enclosure
===John J. Hayes, NRR===
                                                    (301) 415-3167 Attachments:
                1. Referenced Codes and Standards


'E' -Copy with attachment/enclosure
2. List of Recently Issued NRC Information Notices


'N'
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
* No conp


I Cl NAME ayes RABeneaict,'
OFFICE T                                          TECH ED          l        OECB 14F            1    SC:TERB ,,Jir-C:TERB/DOTS I Cl
RLEmch , CiMiller cog J llDATE OS/ V/95y V 05/ /95 05/oZ /95 05/2.? /95 05/ N-/95 SC:OECB/DOPS


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NAME                  ayes                                                RABeneaict,'              RLEmch ,                    CiMiller cogllJ


I ID:DOPS I 1 EFGoodwin
DATE            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 1J


AEChaffee
EFGoodwin                      AEChaffee                   BKGrimes


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


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

Latest revision as of 04:34, 24 November 2019

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
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 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 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 its degradation.

Exposure of charcoal to chemical compounds can result incharcoal may perform

With such degradation, in the event of an accident, the

evaluation.

at an efficiency less than that assumed in the staff's safety

adsorbers in their

Therefore, if licensees divert air flow through charcoal

cleaning, they may find it

ventilation systems during and/or after chemical ensure that the

to

appropriate to perform a laboratory test of the charcoal limit.

charcoal has not degraded below its TS surveillance requirements

response. If

This information notice requires no specific action or writtenplease contact

you have any questions about the information in this notice, of Nuclear

the technical contact listed below or the appropriate Office

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

"Standard Test Method

American Society for Testing and Materials, ASTM D3803, Pennsylvania.

for Nuclear-Grade Activated Carbon,' Philadelphia,

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 Supplemental Information 09/20/95 All holders of OLs or CPs

to Generic Letter 95-03, for nuclear power reactors.

"Circumferential Cracking

of Steam Generator Tubes"

95-39 Brachytherapy Incidents 09/19/95 All U.S. Nuclear Regulatory

Involving Treatment Commission Medical

Planning Errors Licensees.

95-38 Degradation of Boraflex 09/08/95 All holders of OLs or CPs

Neutron Absorber in for nuclear power reactors.

Spent Fuel Storage Racks

95-37 Inadequate Offsite Power 09/07/95 All holders of OLs or CPs

System Voltages during for nuclear power reactors.

Design-Basis Events

95-36 Potential Problems with 08/29/95 All holders of OLs or CPs

Post-Fire Emergency for nuclear power reactors.

Lighting

95-35 Degraded Ability of 08/28/95 All holders of OLs or CPs

Steam Generators to for pressurized water

Remove Decay Heat by reactors (PWRs).

Natural Circulation

95-34 Air Actuator and Supply 08/25/95 All holders of OLs or CPs

Air Regulator Problems in for nuclear power reactors.

Copes-Vulcan Pressurizer

Power-Operated Relief Valves

93-83, Potential Loss of Spent 08/24/95 All holders of OLs or CPs

Supp. 1 Fuel Pool Cooling After a for nuclear power reactors.

Loss-of-Coolant Accident

or a Loss of Offsite Power

95-33 Switchgear Fire and 08/23/95 All holders of OLs or CPs

Partial Loss of Offsite for nuclear power reactors.

Power at Waterford

Generating Station, Unit 3 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 INID/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 copy Ad_ try

a_An- .--- -ta~ rh otonl IF' . Cnnv with atnchmentlenclosure *N' - No copy

T o receive 0? this cocunwnt, Indicate mnXn. o:A; - s°Pqt

wnn u--a........ o ---- -

OFFICE TERB:DOTS IC ADM:[PUB NOECB:DOPS IE 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

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.___ _ I t IL/ tLt1:UKrM I -11 NAME EFGoodwin* IRKiessel* _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

Ire lculy.

  • wpy. u.l ocuun....

S. *"11.b_-f

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  • ttsdtmfilfntjnfLd E

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OFFICE TERB:DOTS lC ADM:PUB IN OECB:DOPS EE SC/TERB:DOTSI E C/

Tech Ed/MMejac* RABenedict* RLEmch* CLMiller*

I

NAME JJHayes*

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

. M. a.

(FF FIC SCIFECR:DOPS I N IPECB:DRPM I EI UPLUB; WPM IA/IUUKrfi I I

I .-- .- I . . ' --

.. 0 . ... ... ,,, - .. . -

NAME 1EFGoodwin* _RKiessel 42 AEChaffee _ DMCrutchfeld l

DATE 105/15/95 109/J3 /95 T 09/.5 1fj1 /95 09/ /95

^rIrY0 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

C" = Copy without attachmentlenclosure 'E' = Copy with attachment/enclosure ON' - No copy

To receive a copy of this document, Indicate In the box:

C A M:PUB 1 N [OECB:DOPS E SC/TERB:DOTS C/TERB:DOTS lE KE

OFFICE TERB:DOTS

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

- . - _

ISC/fECBRiOPS-

-- v -.. A I

I- N IOECB:DOPS

_ I IM/utCu:VUVp I I uIuurP . -- 1 11 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 IE SC/TERB:DOTS IE 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 IC/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 -

A - ..

Exposure of charcoal to chemical compounds can result in a degradation of the .-14-.,-I.

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'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 IE 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 cogllJ

DATE 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 1J

EFGoodwin AEChaffee BKGrimes

05/ /95 05/ /95 05/ /95


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