Information Notice 1993-40, Fire Endurance Test Results for Thermal Ceramics FP-60 Fire Barrier Material: Difference between revisions

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| issue date = 05/26/1993
| issue date = 05/26/1993
| title = Fire Endurance Test Results for Thermal Ceramics FP-60 Fire Barrier Material
| title = Fire Endurance Test Results for Thermal Ceramics FP-60 Fire Barrier Material
| author name = Grimes B K
| author name = Grimes B
| author affiliation = NRC/NRR
| author affiliation = NRC/NRR
| addressee name =  
| addressee name =  
Line 14: Line 14:
| page count = 14
| page count = 14
}}
}}
{{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY
{{#Wiki_filter:UNITED STATES


COMMISSION
NUCLEAR REGULATORY COMMISSION


===OFFICE OF NUCLEAR REACTOR REGULATION===
OFFICE OF NUCLEAR REACTOR REGULATION
WASHINGTON, D.C. 20555 May 26, 1993 NRC INFORMATION


NOTICE 93-40: FIRE ENDURANCE
WASHINGTON, D.C. 20555 May 26, 1993 NRC INFORMATION NOTICE 93-40:   FIRE ENDURANCE TEST RESULTS FOR THERMAL


TEST RESULTS FOR THERMAL CERAMICS FP-60 FIRE BARRIER MATERIAL
CERAMICS FP-60 FIRE BARRIER MATERIAL


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


licenses or construction
reactors.
 
permits for nuclear power 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 results of fire endurance and ampacity derating


notice to alert addressees
test reports submitted by Thermal Ceramics on the FireMaster FP-60 fire


to results of fire endurance
barrier system and the results of NRC staff reviews. It is expected that


and ampacity derating test reports submitted
recipients will review the information for applicability to their facilities


by Thermal Ceramics on the FireMaster
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.


FP-60 fire barrier system and the results of NRC staff reviews. It is expected that recipients
===Descriotion of Circumstances===
In Generic Letter (GL) 92-08, wThermo-Lag 330-1 Fire Barriers," the staff


will review the information
stated it would evaluate other known fire barrier materials and systems that


for applicability
are used by licensees to fulfill NRC fire protection requirements. The staff


to their facilities
is now evaluating fire barriers manufactured by other vendors to verify the


and consider actions as appropriate, to avoid similar problems.
ability of the barriers to adequately perform their 1-hour or 3-hour fire


However, suggestions
resistive functions and to meet stated ampacity derating values. Thermal


contained
Ceramics, Inc., formerly the Insulating Products Division of Babcock and


in this information
Wilcox, Inc., of Augusta, Georgia, manufactures the FP-60 fire barrier system


notice are not NRC requirements;
and submitted reports on two fire endurance tests and one ampacity derating
therefore, no specific action or written response is required.Descriotion


of Circumstances
test to the NRC in a letter of February 23, 1993.


In Generic Letter (GL) 92-08, wThermo-Lag
Discussion


330-1 Fire Barriers," the staff stated it would evaluate other known fire barrier materials
In its review of the Thermal Ceramics reports, the staff identified the


and systems that are used by licensees
following information.


to fulfill NRC fire protection
In its product literature, Thermal Ceramics states that the FP-60 product is


requirements.
manufactured for use on cable trays, conduits, junction boxes, and other cable


The staff is now evaluating
raceways. The primary component, the FireMaster FP-60 blanket, is a ceramic


fire barriers manufactured
fiber blanket with thicknesses varying from 2.5 cm [1 inch] to 7.6 cm


by other vendors to verify the ability of the barriers to adequately
[3 inches]. Optional aluminum or stainless steel foil, Kao-Tex (woven cloth),
or other cloth facings are provided for physical protection of the blanket.


perform their 1-hour or 3-hour fire resistive
The vendor claims that the material, when installed according to the


functions
instructions, is qualified for up to a 13/4-hour fire rating using the American


and to meet stated ampacity derating values. Thermal Ceramics, Inc., formerly the Insulating
9305260385  '  P        I)oktce. 93-o


Products Division of Babcock and Wilcox, Inc., of Augusta, Georgia, manufactures
POR          %'K


the FP-60 fire barrier system and submitted
P~ktcL93sI4


reports on two fire endurance
IN 93-40
                                                                May 26, 1993 Society for Testing and Materials (ASTM) Standard E-119, "Standard Test


tests and one ampacity derating test to the NRC in a letter of February 23, 1993.Discussion
Methods for Fire Tests of Building Construction and Materials."
    FIRE ENDURANCE TESTS


In its review of the Thermal Ceramics reports, the staff identified
According to one report submitted by Thermal Ceramics, a.1-hour fire endurance


the following
test of the FP-60 fire barrier in various configurations was performed at


information.
Underwriters Laboratories, Inc. (UL File R11044-1, Project 84NK8356, March 22, 1985). The test followed UL Subject 1724, "Outline of


In its product literature, Thermal Ceramics states that the FP-60 product is manufactured
Investigation, Fire Tests for Electrical Circuit Protective Systems,"
  May 1984. According to the report, the furnace temperatures followed the


for use on cable trays, conduits, junction boxes, and other cable raceways.
ASTM E-119 standard time-temperature curve for fire exposure, and the barriers


The primary component, the FireMaster
were subjected to a solid hose stream test. The report also states that


FP-60 blanket, is a ceramic fiber blanket with thicknesses
circuit integrity was monitored.


varying from 2.5 cm [1 inch] to 7.6 cm[3 inches]. Optional aluminum or stainless
Documented test configurations included 91.4 cm [36 inch] wide open-ladder and


steel foil, Kao-Tex (woven cloth), or other cloth facings are provided for physical protection
solid-back steel cable trays, an air drop assembly, 12.7 cm [5 inch] diameter


of the blanket.The vendor claims that the material, when installed
steel conduits, and a 30.5x15.2 cm (12x6 inch] steel Junction box. All


according
configurations contained cables. Two hundred fifty thermocouples were


to the instructions, is qualified
reportedly used to measure temperatures of cables, cable trays, Junction


for up to a 13/4-hour fire rating using the American 9305260385
* boxes, conduits and electrical circuit protective systdms on the unexposed
' P I)oktce. 93-o POR %'K P~ktcL93sI4 IN 93-40 May 26, 1993 Society for Testing and Materials (ASTM) Standard E-119, "Standard


Test Methods for Fire Tests of Building Construction
1 side of the assembly.


and Materials." FIRE ENDURANCE
x  According to the report, within 30 seconds of the start of the test, the


TESTS According
j  filament tape around the blanket wrap ignited. At 5 minutes, flames


to one report submitted
#  reportedly issued from seams and butt joints. The report also states that at


by Thermal Ceramics, a. 1-hour fire endurance test of the FP-60 fire barrier in various configurations
20 minutes, some of the wrap slipped out of position resulting in an opening


was performed
^ in the barrier, and at 60 minutes, there was a 8.9 cm [3X inch] opening


at Underwriters
in the


Laboratories, Inc. (UL File R11044-1, Project 84NK8356, March 22, 1985). The test followed UL Subject 1724, "Outline of Investigation, Fire Tests for Electrical
barrier. Some thermocouple measurements reportedly ranged from 204 'C


Circuit Protective
[400 OF] to 260 eC [500 OF] at the end of the fire test.


Systems," May 1984. According
After the test, some cables were documented to be fused together, and cable


to the report, the furnace temperatures
jackets were melted and blistered. The hose stream eroded the bottom surface


followed the ASTM E-119 standard time-temperature
of the cable tray barrier so that the tray was exposed.


curve for fire exposure, and the barriers were subjected
The UL report concluded that the tested fire barrier had a 1-hour fire rating


to a solid hose stream test. The report also states that circuit integrity
because circuit integrity was maintained during the fire exposure and hose


was monitored.
stream test. However, it appears that the UL approval is limited to minimum


Documented
91.4 cm [36 inch] wide cable trays and 12.7 cm [5 inch] or larger-diameter


test configurations
conduits with minimum No. 16 AWG jacketed multi-conductor cables or minimum


included 91.4 cm [36 inch] wide open-ladder
No. 300 MCM jacketed copper single conductor power cables with polyvinyl


and solid-back
chloride jackets.


steel cable trays, an air drop assembly, 12.7 cm [5 inch] diameter steel conduits, and a 30.5x15.2 cm (12x6 inch] steel Junction box. All configurations
The second fire endurance test report submitted by Thermal Ceramics documented


contained
a Southwest Research Institute small-scale test, "One Hour Fire Qualification


cables. Two hundred fifty thermocouples
Test of a Protective Envelope for Class 1E Electrical Conduit Circuits," (SwRI


were reportedly
Project 01-8305-053, February 1986). According to this report, the test


used to measure temperatures
employed the ASTM E-119 standard time-temperature curve for fire exposure and


of cables, cable trays, Junction* boxes, conduits and electrical
a subsequent solid hose stream test. The report also states that circuit


circuit protective
integrity was monitored. SwRI documented the use of a small-scale furnace


systdms on the unexposed 1 side of the assembly.x According
(maximum test specimen of 425.8 square cm (66 square inches]) to test a


to the report, within 30 seconds of the start of the test, the j filament tape around the blanket wrap ignited. At 5 minutes, flames# reportedly
2.5 cm [1 inch] diameter conduit with a pull box, a 5.1 cm [2 inch] diameter


issued from seams and butt joints. The report also states that at 20 minutes, some of the wrap slipped out of position resulting
conduit with a junction box, and an air drop. According to the report,. these


in an opening^ in the barrier, and at 60 minutes, there was a 8.9 cm [3X inch] opening in the barrier. Some thermocouple
IN 93-40
                                                              May 26, 1993 test assemblies each contained a single-conductor power cable and two control


measurements
cables, all with PVC jackets.


reportedly
Recorded cable temperatures (measured at the cable jackets) at the end of the


ranged from 204 'C[400 OF] to 260 eC [500 OF] at the end of the fire test.After the test, some cables were documented
fire exposure ranged from 146.5 'C (296 *F] to 164 C (327 OF]. According hoseto


to be fused together, and cable jackets were melted and blistered.
the report, circuit integrity was  maintained during the fire  exposure and


The hose stream eroded the bottom surface of the cable tray barrier so that the tray was exposed.The UL report concluded
stream tests.


that the tested fire barrier had a 1-hour fire rating because circuit integrity
The barrier and cable conditions after the fire exposure were not reported.


was maintained
The test report suggests that the hose stream test caused some barrier damage, although the test report did not clearly report the extent of damage. SwRI


during the fire exposure and hose stream test. However, it appears that the UL approval is limited to minimum 91.4 cm [36 inch] wide cable trays and 12.7 cm [5 inch] or larger-diameter
did not report a conclusion as to the acceptability of the fire barrier


conduits with minimum No. 16 AWG jacketed multi-conductor
system.


cables or minimum No. 300 MCM jacketed copper single conductor
In a letter of April 27, 1993 to Thermal Ceramics, Inc., the staff expressed


power cables with polyvinyl chloride jackets.The second fire endurance
concerns regarding the ability of the FP-60 system to meet existing NRC fire


test report submitted
barrier acceptance criteria.


by Thermal Ceramics documented
===AMPACITY DERATING TEST===
The ampacity derating test report submitted by Thermal Ceramics was SwRI


a Southwest
Project 01-8818-210, "Ampacity Derating of Fire-Protected Cables in Conduit


Research Institute
and Cable Trays Using Babcock & Wilcox, Incorporated's Passive Fire Protection


small-scale
System," issued by SwRI on July 8, 1986. According to the report, a 1-hour


test, "One Hour Fire Qualification
fire barrier was used in the test. Three-conductor XLPE-insulated 6 AWG


Test of a Protective
cables with Hypalon protective wraps were reportedly installed in a


Envelope for Class 1E Electrical
61 cm (24 inch] wide by 10.2 cm [4 inch] deep cable tray, and 3-conductor


Conduit Circuits," (SwRI Project 01-8305-053, February 1986). According
XLPE-insulated 3 AWG cables with Hypalon protective wraps were installed in a


to this report, the test employed the ASTM E-119 standard time-temperature
10.2 cm [4 inch] diameter conduit. Both assemblies were reported to be


curve for fire exposure and a subsequent
3.7 m [12 feet] long and completely filled. The report stated that


solid hose stream test. The report also states that circuit integrity
thermocouples were installed in slits' in the cable insulation.


was monitored.
According to the report, a steady-state temperature of 90 eC (194 *F) at the


SwRI documented
hottest single thermocouple was monitored. Equilibrium temperature was


the use of a small-scale
reportedly established when a steady-state condition (+/-1 eC per hour (+/-1.8 OF


furnace (maximum test specimen of 425.8 square cm (66 square inches]) to test a 2.5 cm [1 inch] diameter conduit with a pull box, a 5.1 cm [2 inch] diameter conduit with a junction box, and an air drop. According
per hour]) was achieved for 3 hours without any perturbation to the system.


to the report,. these
The ampacity derating for the cable tray and conduit was estimated to be 62.4 and 41.4 percent, respectively, based on the test results.


IN 93-40 May 26, 1993 test assemblies
Some licensees use the FP-60 fire barrier system to achieve physical


each contained
independence of electrical systems in accordance with Regulatory Guide 1.75, Physical Independence of Electrical Systems." Ampacity derating in fire


a single-conductor
barrier systems installed to achieve physical independence of electric systems


power cable and two control cables, all with PVC jackets.Recorded cable temperatures (measured
is a consideration in the design of such systems as well as in those installed


at the cable jackets) at the end of the fire exposure ranged from 146.5 'C (296 *F] to 164 C (327 OF]. According
to protect safe shutdown capability from a fire.


to the report, circuit integrity
Cables enclosed in electrical raceways protected with fire barrier materials


was maintained
are derated to ensure that systems have sufficient capacity and capability to


during the fire exposure and hose stream tests.The barrier and cable conditions
perform their intended safety functions. These cables are derated because of


after the fire exposure were not reported.The test report suggests that the hose stream test caused some barrier damage, although the test report did not clearly report the extent of damage. SwRI did not report a conclusion
the insulating effect of the fire barrier material. Other factors that affect


as to the acceptability
ampacity derating include cable fill, cable loading, cable type, raceway


of the fire barrier system.In a letter of April 27, 1993 to Thermal Ceramics, Inc., the staff expressed concerns regarding
construction, and ambient temperature.


the ability of the FP-60 system to meet existing NRC fire barrier acceptance
IN 93-40
                                                            May 26, 1993 Cable derating calculations that are based on inaccurate or nonconservative


criteria.AMPACITY DERATING TEST The ampacity derating test report submitted
derating factors could result in installation of undersized cables or raceway


by Thermal Ceramics was SwRI Project 01-8818-210, "Ampacity
overfilling. This could cause operating temperatures to exceed design limits


Derating of Fire-Protected
within the raceways thereby reducing the expected design life of the cables.


Cables in Conduit and Cable Trays Using Babcock & Wilcox, Incorporated's
In the letter to Thermal Ceramics, Inc., of April 27, 1993, the staff


===Passive Fire Protection===
requested additional information on ampacity derating.
System," issued by SwRI on July 8, 1986. According


to the report, a 1-hour fire barrier was used in the test. Three-conductor
The National Electrical Code, Insulated Cable Engineers Association (ICEA)
publications, and other industry standards provide general ampacity derating


XLPE-insulated
factors for open-air installations but do not include derating factors for


6 AWG cables with Hypalon protective
fire barrier systems. The Insulated Conductors Committee of the IEEE Power


wraps were reportedly
Engineering Society, Task Force 12-45, has been developing IEEE Standard


installed
Procedure P848, "Procedure for the Determination of the Ampacity Derating of


in a 61 cm (24 inch] wide by 10.2 cm [4 inch] deep cable tray, and 3-conductor
Fire Protected Cables," for use as an industry standard. The industry


XLPE-insulated
consensus standard development process may formulate an appropriate technical


3 AWG cables with Hypalon protective
approach to the determination of ampacity derating factors for cables enclosed


wraps were installed
by fire barrier systems.


in a 10.2 cm [4 inch] diameter conduit. Both assemblies
The staff is continuing to review this product for its ability to perform its


were reported to be 3.7 m [12 feet] long and completely
fire resistive function and will evaluate whether further generic


filled. The report stated that thermocouples
communications are needed to address the issues discussed above.


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


in slits' in the cable insulation.
you have any questions about the information in this notice, please contact


According
the technical contact listed below or the appropriate Office of Nuclear


to the report, a steady-state
Reactor Regulation (NRR) project manager.


temperature
Brian K. Grimes, Director


of 90 eC (194 *F) at the hottest single thermocouple
Division of Operating Reactor Support


was monitored.
Office of Nuclear Reactor Regulation


Equilibrium
Technical contact:  Isabel M. Miller, NRR


temperature
(301) 504-2852 Attachment:


was reportedly
===List of Recently Issued Information Notices===


established
*2    IN 93-40
                                                                  May 26, 1993 Cable derating calculations that are based on inaccurate or nonconservative


when a steady-state
derating factors could result in installation of undersized cables or raceway


condition
overfilling. This could cause operating temperatures to exceed design limits


(+/-1 eC per hour (+/-1.8 OF per hour]) was achieved for 3 hours without any perturbation
within the raceways thereby reducing the expected design life of the cables.


to the system.The ampacity derating for the cable tray and conduit was estimated
In the letter to Thermal Ceramics, Inc., of April 27, 1993, the staff


to be 62.4 and 41.4 percent, respectively, based on the test results.Some licensees
requested additional information on ampacity derating.


use the FP-60 fire barrier system to achieve physical independence
The National Electrical Code, Insulated Cable Engineers Association (ICEA)
publications, and other industry standards provide general ampacity derating


of electrical
factors for open-air installations but do not include derating factors for


systems in accordance
fire barrier systems. The Insulated Conductors Committee of the IEEE Power


with Regulatory
Engineering Society, Task Force 12-45, has been developing IEEE Standard


Guide 1.75, Physical Independence
Procedure P848, "Procedure for the Determination of the Ampacity Derating of


of Electrical
Fire Protected Cables,' for use as an industry standard. The industry


Systems." Ampacity derating in fire barrier systems installed
consensus standard development process may formulate an appropriate technical


to achieve physical independence
approach to the determination of ampacity derating factors for cables enclosed


of electric systems is a consideration
by fire barrier systems.


in the design of such systems as well as in those installed to protect safe shutdown capability
The staff is continuing to review this product for its ability to perform its


from a fire.Cables enclosed in electrical
fire resistive function and will evaluate whether further generic


raceways protected
communications are needed to address the issues discussed above.


with fire barrier materials are derated to ensure that systems have sufficient
This information notice requires no specific action or written response. If


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


to perform their intended safety functions.
the technical contact listed below or the appropriate Office of Nuclear


These cables are derated because of the insulating
Reactor Regulation (NRR) project manager. Orginal ignd y


effect of the fire barrier material.
Brian K.Grimes


Other factors that affect ampacity derating include cable fill, cable loading, cable type, raceway construction, and ambient temperature.
Brian K. Grimes, Director


IN 93-40 May 26, 1993 Cable derating calculations
Division of Operating Reactor Support


that are based on inaccurate
Office of Nuclear Reactor Regulation


or nonconservative
Technical contact:    Isabel M. Miller, NRR


derating factors could result in installation
(301) 504-2852 Attachment:
List of Recently Issued Information Notices


of undersized
*See previous concurrence


cables or raceway overfilling.
*SPLB:DSSA          *SPLB:DSSA        *TechEd


This could cause operating
IMiller            SWest              DGable


temperatures
05/06/93        ,    05/06/93          05/10/93
*SPLB:DSSA          *OGC              *DE:EELB


to exceed design limits within the raceways thereby reducing the expected design life of the cables.In the letter to Thermal Ceramics, Inc., of April 27, 1993, the staff requested
CMcCracken        JGoldberg          CBerlinger


additional
5/20/93            5/20/93            05/25/93
*DD:DSSA            *D:DSSA            *OGCB:DORS


information
MVirgilio          AThadani          GMarcus              Grimes


on ampacity derating.The National Electrical
05/25/93          05/25/93          05/25/93            S    g&493 DOCUMENT NAME:    93-40.IN


Code, Insulated
IN 93-XX


Cable Engineers
May xx, 1993 Cable derating calculations that are based on inaccurate or nonconservative


Association (ICEA)publications, and other industry standards
derating factors could result in installation of undersized cables or raceway


provide general ampacity derating factors for open-air installations
overfilling. This could cause operating temperatures to exceed design limits


but do not include derating factors for fire barrier systems. The Insulated
within the raceways thereby reducing the expected design life of the cables.


Conductors
In the letter to thermal ceramics of April 27, 1993, the staff requested


Committee
additional information on ampacity derating.


of the IEEE Power Engineering
The National Electrical Code, Insulated Cable Engineers Association (ICEA)
publications, and other industry standards provide general ampacity derating


Society, Task Force 12-45, has been developing
factors for open-air installations but do not include derating factors for


IEEE Standard Procedure
fire barrier systems. The Insulated Conductors Committee of the IEEE Power


P848, "Procedure
Engineering Society, Task Force 12-45, has been developing IEEE Standard


for the Determination
Procedure P848, "Procedure for the Determination of the Ampacity Derating of


of the Ampacity Derating of Fire Protected
Fire Protected Cables," for use as an industry standard. The industry


Cables," for use as an industry standard.
consensus standard development process may formulate an appropriate technical


The industry consensus
approach to the determination of ampacity derating factors for cables enclosed


standard development
by fire barrier systems.


process may formulate
The staff is continuing to review this product for its ability to perform its


an appropriate
fire resistive function and will evaluate whether further generic


technical approach to the determination
communications are needed to address the issues discussed above.


of ampacity derating factors for cables enclosed by fire barrier systems.The staff is continuing
This information notice requires no specific action or written response. If


to review this product for its ability to perform its fire resistive
you have any questions about the information in this notice, please contact


function and will evaluate whether further generic communications
the technical contact listed below or the appropriate Office of Nuclear


are needed to address the issues discussed
Reactor Regulation (NRR) project manager.


above.This information
Brian K. Grimes, Director


notice requires no specific action or written response.
Division of Operating Reactor Support


If you have any questions
Office of Nuclear Reactor Regulation


about the information
Technical contact:  Isabel M. Miller, NRR


in this notice, please contact the technical
(301) 504-2852 Attachment:
List of Recently Issued Information Notices


contact listed below or the appropriate
*See previous concurrence


Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Operating
SPLB:DSSA          SPLB:DSSA        TechEd


===Reactor Support Office of Nuclear Reactor Regulation===
*IMiller          *SWest            *DGable
Technical


contact: Isabel M. Miller, NRR (301) 504-2852 Attachment:
05/06/93          05/06/93          05/10/93 SPLB:DSSA          OGC              *DE:EELB
List of Recently Issued Information


Notices
CMcCracken*        JGoldberg*        CBerlinger


* 2 IN 93-40 May 26, 1993 Cable derating calculations
5/20/93            5/20/93          05/25/93
*DD:DSSA          *D:DSSA          *OGCB:DORS        D:DORS


that are based on inaccurate
MVirgilio          AThadani          GMarcus          BGrimes


or nonconservative
05/25/93          05/25/93          05/25/93          / /93 DOCUMENT NAME:  INPSB.1


derating factors could result in installation
---------------
          4 factors for open-air installations but do not include derating factors for


of undersized
fire barrier systems. The Insulated Conductors Committee of the IEEE Power


cables or raceway overfilling.
Engineering Society, Task Force 12-45, has been developing IEEE Standard


This could cause operating
Procedure P848, Procedure for the Determination of the Ampacity Derating of


temperatures
Fire Protected Cables,' for use as an industry standard. The staff encourages


to exceed design limits within the raceways thereby reducing the expected design life of the cables.In the letter to Thermal Ceramics, Inc., of April 27, 1993, the staff requested
licensees to participate in the industry consensus standard development


additional
process to formulate an appropriate technical approach to the determination of


information
ampacity derating factors for cables enclosed by fire barrier systems.


on ampacity derating.The National Electrical
The staff is continuing to review this product for its ability to perform its


Code, Insulated
fire resistive function and will take further action if appropriate.


Cable Engineers
This information notice requires no specific action or written response.


Association (ICEA)publications, and other industry standards
If you have any questions about the information in this notice, please contact


provide general ampacity derating factors for open-air installations
the technical contact listed below or the appropriate Office of Nuclear


but do not include derating factors for fire barrier systems. The Insulated
Reactor Regulation (NRR) project manager.


Conductors
Brian K. Grimes, Director


Committee
Division of Operating Reactor Support


of the IEEE Power Engineering
Office of Nuclear Reactor Regulation


Society, Task Force 12-45, has been developing
Technical contact:  Isabel M. Miller, NRR


IEEE Standard Procedure
(301) 504-2852 Attachment:
                List of Recently Issued Information Notices


P848, "Procedure
*See previous concurrence


for the Determination
SPLB:DSSA          SPLB:DSSA          TechEd


of the Ampacity Derating of Fire Protected
*IMiller          *SWest            *DGable


Cables,' for use as an industry standard.
05/06/93          05/06/93          05/10/93 SPLB:DSSA          OGC                DE:EELB


The industry consensus
CMcCracken*        JGoldberg*        CBerlinger*
                5/20/93            5/20/93/            / /93 DD:DSSA            D:DSSA M          OGCBD;ORS        D: DORS


standard development
MVirgilio*                AThadani    &M GMar~                  BGrimes


process may formulate
/ /93          5  f1;93            1-/ (/93 AlS        /  /93
                [G:\THERMOLA\OTHERVEN\IN FP60.R3]
                Originator: Isabel Miller


an appropriate
_L


technical approach to the determination
factors for open-air installations but do not include derating factors for


of ampacity derating factors for cables enclosed by fire barrier systems.The staff is continuing
fire barrier systems. The Insulated Conductors Committee of the IEEE Power


to review this product for its ability to perform its fire resistive
Engineering Society, Task Force 12-45, has been developing IEEE Standard


function and will evaluate whether further generic communications
Procedure P848, "Procedure for the Determination of the Ampacity Derating of


are needed to address the issues discussed
Fire Protected Cables," for use as an industry standard. The staff encourages


above.This information
licensees to participate in the industry consensus standard development


notice requires no specific action or written response.
process to formulate an appropriate technical approach to the determination of


If you have any questions
ampacity derating factors for cables enclosed by fire barrier systems.


about the information
This information notice requires no specific action or written response.


in this notice, please contact the technical
The staff is continuing to review this product for its ability to perform its


contact listed below or the appropriate
fire resistive function and will take further action if appropriate. If you


Office of Nuclear Reactor Regulation (NRR) project manager. Orginal ignd y Brian K. Grimes Brian K. Grimes, Director Division of Operating
have any questions about the information in this notice, please contact the


===Reactor Support Office of Nuclear Reactor Regulation===
technical contact listed below or the appropriate Office of Nuclear Reactor
Technical


contact: Isabel M. Miller, NRR (301) 504-2852 Attachment:
Regulation (NRR) project manager.
List of Recently Issued Information


Notices*See previous concurrence
Brian K. Grimes, Director


*SPLB:DSSA
Division of Operating Reactor Support


*SPLB:DSSA
Office of Nuclear Reactor Regulation


*TechEd IMiller SWest DGable 05/06/93 , 05/06/93 05/10/93*SPLB:DSSA
Technical contact:  Isabel M. Miller, NRR


*OGC *DE:EELB CMcCracken
(301) 504-2852 Attachment:
    List of Recently Issued Information Notices


JGoldberg
*See previous concurrence


CBerlinger
SPLB:DSSA        SPLB:DSSA          TechEd


5/20/93 5/20/93 05/25/93*DD:DSSA *D:DSSA *OGCB:DORS
*IMiller          *SWest            *DGable


MVirgilio
05/06/93          05/06/93          05/10/93 SPLB:DSSA        OGC                DE:EE


AThadani GMarcus Grimes 05/25/93 05/25/93 05/25/93 S g&493 DOCUMENT NAME: 93-40.IN
CMcCracken*      JGoldberg*        CBerltTrg r


IN 93-XX May xx, 1993 Cable derating calculations
5/20/93           5/20/93            -jstk093 DD:DSSA,~        D:DSSA            OGCB:DORS        D:DORS


that are based on inaccurate
M9irgil9          AThadani          GMarcus          BGrimes


or nonconservative
/ /93                / /93          / /93
    [G:\THERMOLA\OTHERVEN\IN FP60.R3]
    Originator: Isabel Miller


derating factors could result in installation
1__  .                          '\1 factors for open-air installations but do not include derating factors for


of undersized
fire barrier systems. The Insulated Conductors Committee of the IEEE Power


cables or raceway overfilling.
Engineering Society, Task Force 12-45, has been developing IEEE Standard


This could cause operating
Procedure P848, "Procedure for the Determination of the Ampacity Derating of


temperatures
Fire Protected Cables," for use as an industry standard. The staff encourages


to exceed design limits within the raceways thereby reducing the expected design life of the cables.In the letter to thermal ceramics of April 27, 1993, the staff requested additional
licensees to participate in the industry consensus standard development


information
process to formulate an appropriate technical approach to the determination of


on ampacity derating.The National Electrical
ampacity derating factors for cables enclosed by fire barrier systems.


Code, Insulated
This information notice requires no specific action or written response. The


Cable Engineers
staff is continuing to review this product for its ability to perform its fire


Association (ICEA)publications, and other industry standards
resistive function and will take further action if appropriate. Licensees are


provide general ampacity derating factors for open-air installations
advised to consider this information when contemplating any changes to their


but do not include derating factors for fire barrier systems. The Insulated
current fire protection program. If you have any questions about the


Conductors
information in this notice, please contact the technical contact listed below


Committee
or the appropriate Office of Nuclear Reactor Regulation (NRR) project manager.


of the IEEE Power Engineering
Brian K. Grimes, Director


Society, Task Force 12-45, has been developing
Division of Operating Reactor Support


IEEE Standard Procedure
Office of Nuclear Reactor Regulation


P848, "Procedure
Technical contact:  Isabel M. Miller, NRR


for the Determination
(301) 504-2852 Attachment:


of the Ampacity Derating of Fire Protected
===List of Recently Issued Information Notices===
*See previous concurrence


Cables," for use as an industry standard.
SPLB:DSSA        SPLB:DSSA        TechEd


The industry consensus
*IMiller          *SWest            *DGabl e


standard development
05/06/93          05/06/v            05/10/93 SPLB:DSSP( ' L                      DE:EELB


process may formulate
CMcCrackelr                          CBerlinger


an appropriate
_.5/P/93                                / /93 DD:DSSA          D:DSSA            OGCB:DORS          D: DORS


technical approach to the determination
MVirgilio        AThadani          GMarcus            BGrimes


of ampacity derating factors for cables enclosed by fire barrier systems.The staff is continuing
/ /93            / /93              / /93              / /93
[G:\THERMOLA\OTHERVEN\IN FP60.R2]
Originator: Isabel Miller


to review this product for its ability to perform its fire resistive
This information notice required no specific action or written response.  If


function and will evaluate whether further generic communications
you have any questions about the information in this notice, please contact


are needed to address the issues discussed
one of the technical contacts listed below or the appropriate Office of


above.This information
Nuclear Reactor Regulation (NRR) project manager.


notice requires no specific action or written response.
Brian K. Grimes, Director


If you have any questions
Division of Operating Reactor Support


about the information
Office of Nuclear Reactor Regulation


in this notice, please contact the technical
Technical contact:  K. Steven West, NRR


contact listed below or the appropriate
(301) 504-1220
Attachment:
List of Recently Issued Information Notices


Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Operating
SPLB:DSSA        SPLB:DSSA


===Reactor Support Office of Nuclear Reactor Regulation===
IMiller          SWest
Technical


contact: Isabel M. Miller, NRR (301) 504-2852 Attachment:
/ /93            / /93          6:7/0/93 OGC              SPLB:DSSA          DE:EELB
List of Recently Issued Information


Notices*See previous concurrence
JGoldberg        CMcCracken        CBerlinger


SPLB:DSSA
/ /93            / /93              / /93 DD:DSSA           D:DSSA            OGCB:DORS        D: DORS


SPLB:DSSA
GHolahan          AThadani          GMarcus          BGrimes


TechEd*IMiller *SWest *DGable 05/06/93 05/06/93 05/10/93 SPLB:DSSA
04/ /93           04/ /93           04/ /93              / /93


OGC *DE:EELB CMcCracken*
. ,- -. 1
JGoldberg*  
                                          ; l  *
CBerlinger
          consider actions as appropriate.


5/20/93 5/20/93 05/25/93*DD:DSSA *D:DSSA *OGCB:DORS
This information notice required no specific action or written response. If


D:DORS MVirgilio
you have any questions about the information in this notice, please contact


AThadani GMarcus BGrimes 05/25/93 05/25/93 05/25/93 / /93 DOCUMENT NAME: INPSB.1
one of the technical contacts listed below or the appropriate Office of
-- -------------
4 factors for open-air installations


but do not include derating factors for fire barrier systems. The Insulated
Nuclear Reactor Regulation (NRR) project manager.


Conductors
Brian K. Grimes, Director


Committee
Division of Operating Reactor Support


of the IEEE Power Engineering
Office of Nuclear Reactor Regulation


Society, Task Force 12-45, has been developing
Technical contai    K. Steven West, NRR


IEEE Standard Procedure
(301) 504-1220
          Attachment:
          List of Recentl2  ssued Information Notices


P848, Procedure
SPLB:DSSA,.                          TechEd


for the Determination
IMilletgfYL      SIest              RiStnde-e


of the Ampacity Derating of Fire Protected
5f/6 /93          t576 /93              / /93 OGC              SPLB:DSSA          DE: EELB


Cables,' for use as an industry standard.
JGoldberg        CMcCracken        CBerlinger


===The staff encourages===
/ /93            / /93              / /93 DD: DSSA          D: DSSA            OGCB:DORS        D: DORS
licensees


to participate
GHolahan          AThadani            GMarcus          BGrimes


in the industry consensus
04/ /93          04/ /93            04/ /93            / /93
          [G:\THERMOLA\FP-60 IN.R1]
          Originator: IsabeT Miller


standard development
I -1 Attachment
 
process to formulate
 
an appropriate
 
technical
 
approach to the determination
 
of ampacity derating factors for cables enclosed by fire barrier systems.The staff is continuing
 
to review this product for its ability to perform its fire resistive
 
function and will take further action if appropriate.
 
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 Operating
 
===Reactor Support Office of Nuclear Reactor Regulation===
Technical
 
contact: Isabel M. Miller, NRR (301) 504-2852 Attachment:
List of Recently Issued Information
 
Notices*See previous concurrence
 
SPLB:DSSA*IMiller 05/06/93 SPLB:DSSA*SWest 05/06/93 TechEd*DGable 05/10/93 SPLB:DSSA CMcCracken*
5/20/93 DD:DSSA MVirgilio*
/ /93 OGC JGoldberg*
5/20/93/D :DSSA M AThadani 5 f1;93 DE:EELB CBerlinger*
/ /93 OGCBD;ORS&M GMar~1-/ (/93 AlS D: DORS BGrimes/ /93[G:\THERMOLA\OTHERVEN\IN
 
FP60.R3]Originator:
Isabel Miller
 
_L factors for open-air installations
 
but do not include derating factors for fire barrier systems. The Insulated
 
Conductors
 
Committee
 
of the IEEE Power Engineering
 
Society, Task Force 12-45, has been developing
 
IEEE Standard Procedure
 
P848, "Procedure
 
for the Determination
 
of the Ampacity Derating of Fire Protected
 
Cables," for use as an industry standard.
 
===The staff encourages===
licensees
 
to participate
 
in the industry consensus
 
standard development
 
process to formulate
 
an appropriate
 
technical
 
approach to the determination
 
of ampacity derating factors for cables enclosed by fire barrier systems.This information
 
notice requires no specific action or written response.The staff is continuing
 
to review this product for its ability to perform its fire resistive
 
function and will take further action if appropriate.
 
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 Operating
 
===Reactor Support Office of Nuclear Reactor Regulation===
Technical
 
contact: Isabel M. Miller, NRR (301) 504-2852 Attachment:
List of Recently Issued Information
 
Notices*See previous concurrence
 
SPLB:DSSA*IMiller 05/06/93 SPLB:DSSA CMcCracken*
5/20/93 DD:DSSA,~M9irgil 9 SPLB:DSSA*SWest 05/06/93 OGC JGoldberg*
5/20/93 TechEd*DGable 05/10/93 DE:EE CBerltTrg
 
r-jstk093 D:DSSA AThadani/ /93 OGCB:DORS GMarcus/ /93 D:DORS BGrimes/ /93[G:\THERMOLA\OTHERVEN\IN
 
FP60.R3]Originator:
Isabel Miller
 
.'\1 factors for open-air installations
 
but do not include derating factors for fire barrier systems. The Insulated
 
Conductors
 
Committee
 
of the IEEE Power Engineering
 
Society, Task Force 12-45, has been developing
 
IEEE Standard Procedure
 
P848, "Procedure
 
for the Determination
 
of the Ampacity Derating of Fire Protected
 
Cables," for use as an industry standard.
 
===The staff encourages===
licensees
 
to participate
 
in the industry consensus
 
standard development
 
process to formulate
 
an appropriate
 
technical
 
approach to the determination
 
of ampacity derating factors for cables enclosed by fire barrier systems.This information
 
notice requires no specific action or written response.
 
The staff is continuing
 
to review this product for its ability to perform its fire resistive
 
function and will take further action if appropriate.
 
Licensees


are advised to consider this information
IN 93-40
                                                          May 26, 1993 LIST OF RECENTLY ISSUED


when contemplating
NRC INFORMATION NOTICES


any changes to their current fire protection
Information                                    Date of


program. If you have any questions
Notice No.             Subject                Issuance  Issued to


about the information
93-39          Radiation Beams from          05/25/93  All holders of OLs or CPs


in this notice, please contact the technical
Power Reactor Biolog-                    for nuclear power reactors.


contact listed below or the appropriate
ical Shields


Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Operating
93-38          Inadequate Testing of         05/24/93  All holders of OLs or CPs


===Reactor Support Office of Nuclear Reactor Regulation===
Engineered Safety                        for nuclear power reactors.
Technical


contact: Isabel M. Miller, NRR (301) 504-2852 Attachment:
Features Actuation
List of Recently Issued Information


Notices*See previous concurrence
System


SPLB:DSSA*IMiller 05/06/93 SPLB:DSSP( ' L CMcCrackelr
93-37          Eyebolts with Indeter-        05/19/93   All holders of OLs or CPs
 
_.5/P/93 DD:DSSA MVirgilio/ /93 SPLB:DSSA*SWest 05/06/v D:DSSA AThadani/ /93 TechEd*DGabl e 05/10/93 DE:EELB CBerlinger
 
/ /93 OGCB:DORS GMarcus/ /93 D: DORS BGrimes/ /93[G:\THERMOLA\OTHERVEN\IN
 
FP60.R2]Originator:
Isabel Miller
 
This information
 
notice required no specific action or written response.
 
If you have any questions
 
about the information
 
in this notice, please contact one of the technical
 
contacts listed below or the appropriate
 
Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Operating
 
===Reactor Support Office of Nuclear Reactor Regulation===
K. Steven West, NRR (301) 504-1220 Technical
 
contact: Attachment:
List of Recently Issued Information
 
Notices SPLB:DSSA IMiller/ /93 OGC JGoldberg/ /93 DD:DSSA GHolahan 04/ /93 SPLB:DSSA SWest/ /93 SPLB:DSSA CMcCracken
 
/ /93 D:DSSA AThadani 04/ /93 6:7/0/93 DE:EELB CBerlinger
 
/ /93 OGCB:DORS GMarcus 04/ /93 D: DORS BGrimes/ /93
., --.1; l *consider actions as appropriate.
 
This information
 
notice required no specific action or written response.
 
If you have any questions
 
about the information
 
in this notice, please contact one of the technical
 
contacts listed below or the appropriate
 
Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Operating
 
===Reactor Support Office of Nuclear Reactor Regulation===
Technical
 
contai Attachment:
List of Recentl2 SPLB:DSSA,.
 
IMilletgfYL
 
5f/6 /93 K. Steven West, NRR (301) 504-1220 ssued Information
 
Notices SIest t576 /93 TechEd RiStnde-e/ /93 OGC JGoldberg/ /93 SPLB:DSSA CMcCracken
 
/ /93 DE: EELB CBerlinger
 
/ /93 DD: DSSA GHolahan 04/ /93 D: DSSA AThadani 04/ /93 OGCB:DORS GMarcus 04/ /93 D: DORS BGrimes/ /93[G:\THERMOLA\FP-60
IN.R1]Originator:
IsabeT Miller
 
I -1 Attachment


IN 93-40 May 26, 1993 LIST OF RECENTLY ISSUED NRC INFORMATION
minate Properties In-                     for nuclear power reactors.


NOTICES Information
stalled in Limitorque


Date of Notice No. Subject Issuance Issued to 93-39 93-38 Radiation
Valve Operator Housing


Beams from Power Reactor Biolog-ical Shields Inadequate
Covers


Testing of Engineered
93-36          Notifications, Reports,        05/07/93  All U.S. Nuclear Regulatory


Safety Features Actuation System 05/25/93 05/24/93 All holders of OLs or CPs for nuclear power reactors.All holders of OLs or CPs for nuclear power reactors.93-37 Eyebolts with Indeter-minate Properties
and Records of Misadmin-                 Commission medical


In-stalled in Limitorque
istrations                                licensees.


Valve Operator Housing Covers 05/19/93 All holders for nuclear of OLs or CPs power reactors.93-36 Notifications, Reports, and Records of Misadmin-istrations
93-35          Insights from Common-          05/12/93   All holders of OLs or CPs


05/07/93 All U.S. Nuclear Regulatory
Cause Failure Events                      for nuclear power plants


Commission
(NPPs).


medical licensees.
93-34,          Potential for Loss of          05/06/93  All holders of OLs or CPs


93-35 Insights from Common-Cause Failure Events 05/12/93 All holders for nuclear (NPPs).of OLs or CPs power plants 93-34, Supp. 1 93-34 Potential
Supp. 1        Emergency Cooling                          for nuclear power reactors.


for Loss of Emergency
Function Due to A


Cooling Function Due to A Combination
Combination of


of Operational
Operational and Post- Loca Debris in Contain- ment


and Post-Loca Debris in Contain-ment Potential
93-34          Potential for Loss of          04/26/93  All holders of OLs or CPs


for Loss of Emergency
Emergency Cooling                          for nuclear power reactors.


Cooling Function Due to A Combination
Function Due to A


of Operational
Combination of


and Post-Loca Debris in Contain-ment 05/06/93 04/26/93 All holders of OLs or CPs for nuclear power reactors.All holders of OLs or CPs for nuclear power reactors.OL = Operating
Operational and Post- Loca Debris in Contain- ment


License CP = Construction
OL  = Operating License


Permit}}
CP  = Construction Permit}}


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

Latest revision as of 04:19, 24 November 2019

Fire Endurance Test Results for Thermal Ceramics FP-60 Fire Barrier Material
ML031080040
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: 05/26/1993
From: Grimes B
Office of Nuclear Reactor Regulation
To:
References
IN-93-040, NUDOCS 9305260385
Download: ML031080040 (14)
v • d • e


UNITED STATES

NUCLEAR REGULATORY COMMISSION

OFFICE OF NUCLEAR REACTOR REGULATION

WASHINGTON, D.C. 20555 May 26, 1993 NRC INFORMATION NOTICE 93-40: FIRE ENDURANCE TEST RESULTS FOR THERMAL

CERAMICS FP-60 FIRE BARRIER MATERIAL

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 results of fire endurance and ampacity derating

test reports submitted by Thermal Ceramics on the FireMaster FP-60 fire

barrier system and the results of NRC staff reviews. 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.

Descriotion of Circumstances

In Generic Letter (GL) 92-08, wThermo-Lag 330-1 Fire Barriers," the staff

stated it would evaluate other known fire barrier materials and systems that

are used by licensees to fulfill NRC fire protection requirements. The staff

is now evaluating fire barriers manufactured by other vendors to verify the

ability of the barriers to adequately perform their 1-hour or 3-hour fire

resistive functions and to meet stated ampacity derating values. Thermal

Ceramics, Inc., formerly the Insulating Products Division of Babcock and

Wilcox, Inc., of Augusta, Georgia, manufactures the FP-60 fire barrier system

and submitted reports on two fire endurance tests and one ampacity derating

test to the NRC in a letter of February 23, 1993.

Discussion

In its review of the Thermal Ceramics reports, the staff identified the

following information.

In its product literature, Thermal Ceramics states that the FP-60 product is

manufactured for use on cable trays, conduits, junction boxes, and other cable

raceways. The primary component, the FireMaster FP-60 blanket, is a ceramic

fiber blanket with thicknesses varying from 2.5 cm [1 inch] to 7.6 cm

[3 inches]. Optional aluminum or stainless steel foil, Kao-Tex (woven cloth),

or other cloth facings are provided for physical protection of the blanket.

The vendor claims that the material, when installed according to the

instructions, is qualified for up to a 13/4-hour fire rating using the American

9305260385 ' P I)oktce. 93-o

POR  %'K

P~ktcL93sI4

IN 93-40

May 26, 1993 Society for Testing and Materials (ASTM) Standard E-119, "Standard Test

Methods for Fire Tests of Building Construction and Materials."

FIRE ENDURANCE TESTS

According to one report submitted by Thermal Ceramics, a.1-hour fire endurance

test of the FP-60 fire barrier in various configurations was performed at

Underwriters Laboratories, Inc. (UL File R11044-1, Project 84NK8356, March 22, 1985). The test followed UL Subject 1724, "Outline of

Investigation, Fire Tests for Electrical Circuit Protective Systems,"

May 1984. According to the report, the furnace temperatures followed the

ASTM E-119 standard time-temperature curve for fire exposure, and the barriers

were subjected to a solid hose stream test. The report also states that

circuit integrity was monitored.

Documented test configurations included 91.4 cm [36 inch] wide open-ladder and

solid-back steel cable trays, an air drop assembly, 12.7 cm [5 inch] diameter

steel conduits, and a 30.5x15.2 cm (12x6 inch] steel Junction box. All

configurations contained cables. Two hundred fifty thermocouples were

reportedly used to measure temperatures of cables, cable trays, Junction

  • boxes, conduits and electrical circuit protective systdms on the unexposed

1 side of the assembly.

x According to the report, within 30 seconds of the start of the test, the

j filament tape around the blanket wrap ignited. At 5 minutes, flames

  1. reportedly issued from seams and butt joints. The report also states that at

20 minutes, some of the wrap slipped out of position resulting in an opening

^ in the barrier, and at 60 minutes, there was a 8.9 cm [3X inch] opening

in the

barrier. Some thermocouple measurements reportedly ranged from 204 'C

[400 OF] to 260 eC [500 OF] at the end of the fire test.

After the test, some cables were documented to be fused together, and cable

jackets were melted and blistered. The hose stream eroded the bottom surface

of the cable tray barrier so that the tray was exposed.

The UL report concluded that the tested fire barrier had a 1-hour fire rating

because circuit integrity was maintained during the fire exposure and hose

stream test. However, it appears that the UL approval is limited to minimum

91.4 cm [36 inch] wide cable trays and 12.7 cm [5 inch] or larger-diameter

conduits with minimum No. 16 AWG jacketed multi-conductor cables or minimum

No. 300 MCM jacketed copper single conductor power cables with polyvinyl

chloride jackets.

The second fire endurance test report submitted by Thermal Ceramics documented

a Southwest Research Institute small-scale test, "One Hour Fire Qualification

Test of a Protective Envelope for Class 1E Electrical Conduit Circuits," (SwRI

Project 01-8305-053, February 1986). According to this report, the test

employed the ASTM E-119 standard time-temperature curve for fire exposure and

a subsequent solid hose stream test. The report also states that circuit

integrity was monitored. SwRI documented the use of a small-scale furnace

(maximum test specimen of 425.8 square cm (66 square inches]) to test a

2.5 cm [1 inch] diameter conduit with a pull box, a 5.1 cm [2 inch] diameter

conduit with a junction box, and an air drop. According to the report,. these

IN 93-40

May 26, 1993 test assemblies each contained a single-conductor power cable and two control

cables, all with PVC jackets.

Recorded cable temperatures (measured at the cable jackets) at the end of the

fire exposure ranged from 146.5 'C (296 *F] to 164 C (327 OF]. According hoseto

the report, circuit integrity was maintained during the fire exposure and

stream tests.

The barrier and cable conditions after the fire exposure were not reported.

The test report suggests that the hose stream test caused some barrier damage, although the test report did not clearly report the extent of damage. SwRI

did not report a conclusion as to the acceptability of the fire barrier

system.

In a letter of April 27, 1993 to Thermal Ceramics, Inc., the staff expressed

concerns regarding the ability of the FP-60 system to meet existing NRC fire

barrier acceptance criteria.

AMPACITY DERATING TEST

The ampacity derating test report submitted by Thermal Ceramics was SwRI

Project 01-8818-210, "Ampacity Derating of Fire-Protected Cables in Conduit

and Cable Trays Using Babcock & Wilcox, Incorporated's Passive Fire Protection

System," issued by SwRI on July 8, 1986. According to the report, a 1-hour

fire barrier was used in the test. Three-conductor XLPE-insulated 6 AWG

cables with Hypalon protective wraps were reportedly installed in a

61 cm (24 inch] wide by 10.2 cm [4 inch] deep cable tray, and 3-conductor

XLPE-insulated 3 AWG cables with Hypalon protective wraps were installed in a

10.2 cm [4 inch] diameter conduit. Both assemblies were reported to be

3.7 m [12 feet] long and completely filled. The report stated that

thermocouples were installed in slits' in the cable insulation.

According to the report, a steady-state temperature of 90 eC (194 *F) at the

hottest single thermocouple was monitored. Equilibrium temperature was

reportedly established when a steady-state condition (+/-1 eC per hour (+/-1.8 OF

per hour]) was achieved for 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> without any perturbation to the system.

The ampacity derating for the cable tray and conduit was estimated to be 62.4 and 41.4 percent, respectively, based on the test results.

Some licensees use the FP-60 fire barrier system to achieve physical

independence of electrical systems in accordance with Regulatory Guide 1.75, Physical Independence of Electrical Systems." Ampacity derating in fire

barrier systems installed to achieve physical independence of electric systems

is a consideration in the design of such systems as well as in those installed

to protect safe shutdown capability from a fire.

Cables enclosed in electrical raceways protected with fire barrier materials

are derated to ensure that systems have sufficient capacity and capability to

perform their intended safety functions. These cables are derated because of

the insulating effect of the fire barrier material. Other factors that affect

ampacity derating include cable fill, cable loading, cable type, raceway

construction, and ambient temperature.

IN 93-40

May 26, 1993 Cable derating calculations that are based on inaccurate or nonconservative

derating factors could result in installation of undersized cables or raceway

overfilling. This could cause operating temperatures to exceed design limits

within the raceways thereby reducing the expected design life of the cables.

In the letter to Thermal Ceramics, Inc., of April 27, 1993, the staff

requested additional information on ampacity derating.

The National Electrical Code, Insulated Cable Engineers Association (ICEA)

publications, and other industry standards provide general ampacity derating

factors for open-air installations but do not include derating factors for

fire barrier systems. The Insulated Conductors Committee of the IEEE Power

Engineering Society, Task Force 12-45, has been developing IEEE Standard

Procedure P848, "Procedure for the Determination of the Ampacity Derating of

Fire Protected Cables," for use as an industry standard. The industry

consensus standard development process may formulate an appropriate technical

approach to the determination of ampacity derating factors for cables enclosed

by fire barrier systems.

The staff is continuing to review this product for its ability to perform its

fire resistive function and will evaluate whether further generic

communications are needed to address the issues discussed above.

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 Operating Reactor Support

Office of Nuclear Reactor Regulation

Technical contact: Isabel M. Miller, NRR

(301) 504-2852 Attachment:

List of Recently Issued Information Notices

May 26, 1993 Cable derating calculations that are based on inaccurate or nonconservative

derating factors could result in installation of undersized cables or raceway

overfilling. This could cause operating temperatures to exceed design limits

within the raceways thereby reducing the expected design life of the cables.

In the letter to Thermal Ceramics, Inc., of April 27, 1993, the staff

requested additional information on ampacity derating.

The National Electrical Code, Insulated Cable Engineers Association (ICEA)

publications, and other industry standards provide general ampacity derating

factors for open-air installations but do not include derating factors for

fire barrier systems. The Insulated Conductors Committee of the IEEE Power

Engineering Society, Task Force 12-45, has been developing IEEE Standard

Procedure P848, "Procedure for the Determination of the Ampacity Derating of

Fire Protected Cables,' for use as an industry standard. The industry

consensus standard development process may formulate an appropriate technical

approach to the determination of ampacity derating factors for cables enclosed

by fire barrier systems.

The staff is continuing to review this product for its ability to perform its

fire resistive function and will evaluate whether further generic

communications are needed to address the issues discussed above.

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. Orginal ignd y

Brian K.Grimes

Brian K. Grimes, Director

Division of Operating Reactor Support

Office of Nuclear Reactor Regulation

Technical contact: Isabel M. Miller, NRR

(301) 504-2852 Attachment:

List of Recently Issued Information Notices

  • See previous concurrence
  • SPLB:DSSA *SPLB:DSSA *TechEd

IMiller SWest DGable

05/06/93 , 05/06/93 05/10/93

  • SPLB:DSSA *OGC *DE:EELB

CMcCracken JGoldberg CBerlinger

5/20/93 5/20/93 05/25/93

  • DD:DSSA *D:DSSA *OGCB:DORS

MVirgilio AThadani GMarcus Grimes

05/25/93 05/25/93 05/25/93 S g&493 DOCUMENT NAME: 93-40.IN

IN 93-XX

May xx, 1993 Cable derating calculations that are based on inaccurate or nonconservative

derating factors could result in installation of undersized cables or raceway

overfilling. This could cause operating temperatures to exceed design limits

within the raceways thereby reducing the expected design life of the cables.

In the letter to thermal ceramics of April 27, 1993, the staff requested

additional information on ampacity derating.

The National Electrical Code, Insulated Cable Engineers Association (ICEA)

publications, and other industry standards provide general ampacity derating

factors for open-air installations but do not include derating factors for

fire barrier systems. The Insulated Conductors Committee of the IEEE Power

Engineering Society, Task Force 12-45, has been developing IEEE Standard

Procedure P848, "Procedure for the Determination of the Ampacity Derating of

Fire Protected Cables," for use as an industry standard. The industry

consensus standard development process may formulate an appropriate technical

approach to the determination of ampacity derating factors for cables enclosed

by fire barrier systems.

The staff is continuing to review this product for its ability to perform its

fire resistive function and will evaluate whether further generic

communications are needed to address the issues discussed above.

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 Operating Reactor Support

Office of Nuclear Reactor Regulation

Technical contact: Isabel M. Miller, NRR

(301) 504-2852 Attachment:

List of Recently Issued Information Notices

  • See previous concurrence

SPLB:DSSA SPLB:DSSA TechEd

  • IMiller *SWest *DGable

05/06/93 05/06/93 05/10/93 SPLB:DSSA OGC *DE:EELB

CMcCracken* JGoldberg* CBerlinger

5/20/93 5/20/93 05/25/93

  • DD:DSSA *D:DSSA *OGCB:DORS D:DORS

MVirgilio AThadani GMarcus BGrimes

05/25/93 05/25/93 05/25/93 / /93 DOCUMENT NAME: INPSB.1

4 factors for open-air installations but do not include derating factors for

fire barrier systems. The Insulated Conductors Committee of the IEEE Power

Engineering Society, Task Force 12-45, has been developing IEEE Standard

Procedure P848, Procedure for the Determination of the Ampacity Derating of

Fire Protected Cables,' for use as an industry standard. The staff encourages

licensees to participate in the industry consensus standard development

process to formulate an appropriate technical approach to the determination of

ampacity derating factors for cables enclosed by fire barrier systems.

The staff is continuing to review this product for its ability to perform its

fire resistive function and will take further action if appropriate.

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 Operating Reactor Support

Office of Nuclear Reactor Regulation

Technical contact: Isabel M. Miller, NRR

(301) 504-2852 Attachment:

List of Recently Issued Information Notices

  • See previous concurrence

SPLB:DSSA SPLB:DSSA TechEd

  • IMiller *SWest *DGable

05/06/93 05/06/93 05/10/93 SPLB:DSSA OGC DE:EELB

CMcCracken* JGoldberg* CBerlinger*

5/20/93 5/20/93/ / /93 DD:DSSA D:DSSA M OGCBD;ORS D: DORS

MVirgilio* AThadani &M GMar~ BGrimes

/ /93 5 f1;93 1-/ (/93 AlS / /93

[G:\THERMOLA\OTHERVEN\IN FP60.R3]

Originator: Isabel Miller

_L

factors for open-air installations but do not include derating factors for

fire barrier systems. The Insulated Conductors Committee of the IEEE Power

Engineering Society, Task Force 12-45, has been developing IEEE Standard

Procedure P848, "Procedure for the Determination of the Ampacity Derating of

Fire Protected Cables," for use as an industry standard. The staff encourages

licensees to participate in the industry consensus standard development

process to formulate an appropriate technical approach to the determination of

ampacity derating factors for cables enclosed by fire barrier systems.

This information notice requires no specific action or written response.

The staff is continuing to review this product for its ability to perform its

fire resistive function and will take further action if appropriate. 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 Operating Reactor Support

Office of Nuclear Reactor Regulation

Technical contact: Isabel M. Miller, NRR

(301) 504-2852 Attachment:

List of Recently Issued Information Notices

  • See previous concurrence

SPLB:DSSA SPLB:DSSA TechEd

  • IMiller *SWest *DGable

05/06/93 05/06/93 05/10/93 SPLB:DSSA OGC DE:EE

CMcCracken* JGoldberg* CBerltTrg r

5/20/93 5/20/93 -jstk093 DD:DSSA,~ D:DSSA OGCB:DORS D:DORS

M9irgil9 AThadani GMarcus BGrimes

/ /93 / /93 / /93

[G:\THERMOLA\OTHERVEN\IN FP60.R3]

Originator: Isabel Miller

1__ . '\1 factors for open-air installations but do not include derating factors for

fire barrier systems. The Insulated Conductors Committee of the IEEE Power

Engineering Society, Task Force 12-45, has been developing IEEE Standard

Procedure P848, "Procedure for the Determination of the Ampacity Derating of

Fire Protected Cables," for use as an industry standard. The staff encourages

licensees to participate in the industry consensus standard development

process to formulate an appropriate technical approach to the determination of

ampacity derating factors for cables enclosed by fire barrier systems.

This information notice requires no specific action or written response. The

staff is continuing to review this product for its ability to perform its fire

resistive function and will take further action if appropriate. Licensees are

advised to consider this information when contemplating any changes to their

current fire protection program. 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 Operating Reactor Support

Office of Nuclear Reactor Regulation

Technical contact: Isabel M. Miller, NRR

(301) 504-2852 Attachment:

List of Recently Issued Information Notices

  • See previous concurrence

SPLB:DSSA SPLB:DSSA TechEd

  • IMiller *SWest *DGabl e

05/06/93 05/06/v 05/10/93 SPLB:DSSP( ' L DE:EELB

CMcCrackelr CBerlinger

_.5/P/93 / /93 DD:DSSA D:DSSA OGCB:DORS D: DORS

MVirgilio AThadani GMarcus BGrimes

/ /93 / /93 / /93 / /93

[G:\THERMOLA\OTHERVEN\IN FP60.R2]

Originator: Isabel Miller

This information notice required no specific action or written response. If

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

one of the technical contacts listed below or the appropriate Office of

Nuclear Reactor Regulation (NRR) project manager.

Brian K. Grimes, Director

Division of Operating Reactor Support

Office of Nuclear Reactor Regulation

Technical contact: K. Steven West, NRR

(301) 504-1220

Attachment:

List of Recently Issued Information Notices

SPLB:DSSA SPLB:DSSA

IMiller SWest

/ /93 / /93 6:7/0/93 OGC SPLB:DSSA DE:EELB

JGoldberg CMcCracken CBerlinger

/ /93 / /93 / /93 DD:DSSA D:DSSA OGCB:DORS D: DORS

GHolahan AThadani GMarcus BGrimes

04/ /93 04/ /93 04/ /93 / /93

. ,- -. 1

l *

consider actions as appropriate.

This information notice required no specific action or written response. If

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

one of the technical contacts listed below or the appropriate Office of

Nuclear Reactor Regulation (NRR) project manager.

Brian K. Grimes, Director

Division of Operating Reactor Support

Office of Nuclear Reactor Regulation

Technical contai K. Steven West, NRR

(301) 504-1220

Attachment:

List of Recentl2 ssued Information Notices

SPLB:DSSA,. TechEd

IMilletgfYL SIest RiStnde-e

5f/6 /93 t576 /93 / /93 OGC SPLB:DSSA DE: EELB

JGoldberg CMcCracken CBerlinger

/ /93 / /93 / /93 DD: DSSA D: DSSA OGCB:DORS D: DORS

GHolahan AThadani GMarcus BGrimes

04/ /93 04/ /93 04/ /93 / /93

[G:\THERMOLA\FP-60 IN.R1]

Originator: IsabeT Miller

I -1 Attachment

IN 93-40

May 26, 1993 LIST OF RECENTLY ISSUED

NRC INFORMATION NOTICES

Information Date of

Notice No. Subject Issuance Issued to

93-39 Radiation Beams from 05/25/93 All holders of OLs or CPs

Power Reactor Biolog- for nuclear power reactors.

ical Shields

93-38 Inadequate Testing of 05/24/93 All holders of OLs or CPs

Engineered Safety for nuclear power reactors.

Features Actuation

System

93-37 Eyebolts with Indeter- 05/19/93 All holders of OLs or CPs

minate Properties In- for nuclear power reactors.

stalled in Limitorque

Valve Operator Housing

Covers

93-36 Notifications, Reports, 05/07/93 All U.S. Nuclear Regulatory

and Records of Misadmin- Commission medical

istrations licensees.

93-35 Insights from Common- 05/12/93 All holders of OLs or CPs

Cause Failure Events for nuclear power plants

(NPPs).

93-34, Potential for Loss of 05/06/93 All holders of OLs or CPs

Supp. 1 Emergency Cooling for nuclear power reactors.

Function Due to A

Combination of

Operational and Post- Loca Debris in Contain- ment

93-34 Potential for Loss of 04/26/93 All holders of OLs or CPs

Emergency Cooling for nuclear power reactors.

Function Due to A

Combination of

Operational and Post- Loca Debris in Contain- ment

OL = Operating License

CP = Construction Permit


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