Information Notice 1995-52, Fire Endurance Test Results for Electrical Raceway Fire Barrier Systems Constructed from 3M Company Interam Fire Barrier Materials: Difference between revisions
StriderTol (talk | contribs) (Created page by program invented by StriderTol) |
StriderTol (talk | contribs) (Created page by program invented by StriderTol) |
||
(2 intermediate revisions by the same user not shown) | |||
Line 3: | Line 3: | ||
| issue date = 11/14/1995 | | issue date = 11/14/1995 | ||
| title = Fire Endurance Test Results for Electrical Raceway Fire Barrier Systems Constructed from 3M Company Interam Fire Barrier Materials | | title = Fire Endurance Test Results for Electrical Raceway Fire Barrier Systems Constructed from 3M Company Interam Fire Barrier Materials | ||
| author name = Crutchfield D | | author name = Crutchfield D | ||
| author affiliation = NRC/NRR | | author affiliation = NRC/NRR | ||
| addressee name = | | addressee name = | ||
Line 15: | Line 15: | ||
| page count = 11 | | page count = 11 | ||
}} | }} | ||
{{#Wiki_filter:UNITED | {{#Wiki_filter:UNITED STATES | ||
NUCLEAR REGULATORY COMMISSION | |||
OFFICE OF NUCLEAR REACTOR REGULATION | |||
WASHINGTON, D.C. 20555-0001 November 14, 1995 NRC INFORMATION NOTICE 95-52: FIRE ENDURANCE TEST RESULTS FOR ELECTRICAL | |||
RACEWAY FIRE BARRIER SYSTEMS CONSTRUCTED FROM | |||
3M COMPANY INTERAM FIRE BARRIER MATERIALS | |||
==Addressees== | ==Addressees== | ||
All holders of operating licenses or construction permits for nuclear | All holders of operating licenses or construction permits for nuclear power | ||
reactors. | |||
==Purpose== | ==Purpose== | ||
The U.S. Nuclear Regulatory Commission (NRC) is issuing this | The U.S. Nuclear Regulatory Commission (NRC) is issuing this information | ||
notice to inform addressees of the results of recent fire endurance tests for | |||
electrical raceway fire barrier systems constructed from 3M Company Interam | |||
fire barrier materials. It is expected that recipients will review the | |||
information for applicability to their facilities and consider this | |||
information, as appropriate, in their review of Interam fire barriers. | |||
Backaround | |||
On April 20, May 17, and July 7, 1995, the NRC staff visited Omega Point | |||
Laboratories (OPL), San Antonio, Texas, to witness full-scale fire endurance | |||
tests for electrical raceway fire barrier systems constructed from 3M Company | |||
Interam fire barrier materials. These tests were sponsored by Peak Seals | |||
Corporation (Peak Seals). Peak Seals informed the NRC staff that the test | |||
specimens included in this test program were intended to represent generic | |||
Interam fire barrier systems and that these test programs were conducted in | |||
accordance with Generic Letter (GL) 86-10, Supplement 1, 'Fire Endurance Test | |||
Acceptance Criteria for Fire Barrier Systems Used To Separate Redundant Safe | |||
Shutdown Trains Within the Same Fire Area." The following information is | |||
based on observations made by the NRC staff who witnessed these fire tests. | |||
The NRC staff has not reviewed the test reports. | |||
==Description of Circumstances== | ==Description of Circumstances== | ||
1-Hour Fire Endurance | 1-Hour Fire Endurance Tests | ||
The first test assembly included nominal 24-inch and 6-inch-wide steel cable | |||
trays; 1-inch, 2-inch, 3-inch, and 5-inch-diameter steel conduits; a 2-inch | |||
diameter air drop; each was arranged in a U-shaped configuration; and a | |||
12-inch by 12-inch by 8-inch steel junction box. With regard to the 2-inch- diameter steel conduit, the Junction box was installed in one of its vertical | |||
runs and the 2-inch diameter air drop was installed in the other. These test | |||
specimens did not include cable fill and were supported by a common trapeze | |||
9511080324- K4 // | |||
6t~zEzt-0 t f51(14 | |||
IN 95-52 November 14, 1995 support. They were protected with three layers of Interam E53A fire barrier | |||
mat material. Each layer was 7.6 mm [0.3 inch] thick. | |||
On April 20, 1995, OPL subjected the test assembly to the test fire specified | |||
in American Society for Testing and Materials (ASTM) Standard E-119, "Fire | |||
Test of Building Construction and Materials," for 1 hour. After the fire | |||
exposure, the test specimens were subjected to a fog-nozzle hose stream test. | |||
The 24-inch-wide cable tray; the 3-inch-, 2-inch-, and 1-inch-diameter | |||
conduits; and the air drop exceeded the temperature rise acceptance criteria | |||
of GL 86-10, Supplement 1, near the end of the 1-hour fire exposure. None of | |||
the barriers burned through during the fire exposure nor were they breached by | |||
the hose stream. Table 1 (see Attachment 1) summarizes the test specimen and | |||
fire barrier configurations and the results of the April 20, 1995, test. | |||
The second test assembly included a 24-inch-wide steel cable tray, 1-inch- and | |||
5-inch-diameter steel conduits, and a 2-inch-diameter air drop. These test | |||
specimens did not contain cables and were protected with three layers of | |||
Interam E54A fire barrier mat material. Each layer was 10 mm [0.4 inch] | |||
thick. | |||
On May 17, 1995, OPL subjected the test assembly to the test fire specified in | |||
ASTM Standard E-119 for 1 hour. After the fire exposure, it subjected the | |||
test specimens to a fog-nozzle hose stream test. These 1-hour test specimens | |||
met the acceptance criteria of Supplement 1 to GL 86-10. Table 2 (see | |||
Attachment 1) summarizes the test specimen and fire barrier configurations and | |||
the results of the May 17, 1995, test. | |||
3-Hour Fire Endurance Test | |||
The third test assembly included nominal 24-inch- and 6-inch-wide steel cable | |||
trays; nominal 1-inch-, 3-inch-, and 5-inch-diameter steel conduits; a 2-inch- diameter air drop; each was arranged in a U-shaped configuration; and a | |||
nominal 12-inch by 12-inch by 8-inch steel junction box. The cable trays were | |||
filled with a single layer of mix cables. The cable trays, the 1-inch- and | |||
3-inch-diameter steel conduits, and the air drop were protected with five | |||
layers of Interam E54A fire barrier mat material. The 5-inch-diameter conduit | |||
and the Junction box were protected with six layers of Interam E54A fire | |||
barrier mat material. Each layer was 10 mm [0.4 inch] thick. | |||
On July 7, 1995, OPL subjected the test assembly to the test fire specified in | |||
ASTM Standard E-119 for 3 hours. After the fire exposure, it subjected the | |||
test specimens to a fog-nozzle hose stream test. The barriers did not burn | |||
through during the fire exposure, nor were they breached by the hose stream. | |||
There was no visible damage to the test specimen cables. However, all of the | |||
test specimens exceeded the temperature rise acceptance criteria of GL 86-10, | |||
Supplement 1. Table 3 (see Attachment 1) summarizes the test specimen and | |||
fire barrier configurations and the results of the July 7, 1995 test. | |||
Discussion | |||
Section 50.48 of Title 10 of the Code of Federal Regulations requires that | |||
each operating nuclear power plant must have a fire protection plan that | |||
IN 95-52 November 14, 1995 satisfies General Design Criterion (GDC) 3 of Appendix A to 10 CFR Part 50. | |||
Fire protection features required to satisfy GDC 3 include features to ensure | |||
that one train of systems necessary to achieve and maintain shutdown | |||
conditions is free of fire damage. One means of satisfying this requirement | |||
is to separate one safe shutdown train from its redundant train with a fire- rated barrier. The level of fire resistance required of the barrier, 1 hour | |||
or 3 hours, depends on the other fire protection features in the fire area. | |||
The NRC issued guidance on acceptable methods of satisfying the regulatory | |||
requirements of GDC 3 in Branch Technical Position (BTP) Auxiliary and Power | |||
Conversion Systems Branch (APCSB) 9.5-1, 'Guidelines for Fire Protection for | |||
Nuclear Power Plants"; Appendix A to BTP APCSB 9.5-1; BTP Chemical Engineering | |||
Branch (CMEB) 9.5-1, "Fire Protection for Nuclear Power Plants"; and GL 86-10, | |||
"Implementation of Fire Protection Requirements." These guidance documents | |||
state that the fire resistance ratings of fire barriers should be established | |||
in accordance with National Fire Protection Association (NFPA) Standard 251, | |||
"Standard Methods of Fire Tests of Building Construction and Materials" | |||
(1975), by subjecting a representative test specimen to a standard fire | |||
exposure. | |||
On March 25, 1994, the NRC issued Supplement 1 to GL 86-10 to (1) clarify the | |||
applicability of the test acceptance criteria in GL 86-10 to raceway fire | |||
barrier systems, (2) specify a set of fire endurance test acceptance criteria | |||
that are acceptable for demonstrating that fire barrier systems can perform | |||
the required fire-resistive function and maintain the protected safe shutdown | |||
train free of fire damage, (3) specify acceptable options for hose stream | |||
testing, and (4) specify criteria for cable functionality testing when a | |||
deviation is necessary, such as when the fire barrier temperature rise | |||
criteria are exceeded or the test specimen cables sustain visible damage. | |||
These positions are incorporated by the NRC staff in its review and evaluation | |||
of the adequacy of fire endurance tests and fire barrier systems proposed by | |||
licensees or applicants to satisfy existing NRC fire protection rules and | |||
regulations. | |||
Some temperatures observed during the tests exceeded the maximum allowable | |||
temperature acceptance criteria of Supplement 1 to GL 86-10. In accordance | |||
with this supplement, an engineering evaluation could be performed to | |||
determine the acceptability of an in-plant Interam fire barrier that was | |||
bounded by a deviating test specimen configuration. Information about such | |||
evaluations can be found in Enclosure 2 of Supplement 1 to GL 86-10. By | |||
letter dated August 7, 1995 [accession number 9509050173 ], Peak Seals | |||
submitted to the NRC staff additional documentation relating to the thermal | |||
performance of the 3-hour fire barrier test specimens for information. | |||
1 NFPA adopted ASTM Standard E-119 as NFPA Standard 251. | |||
IN 95-52 November 14, 1995 This information notice requires 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 Regulation (NRR) project manager. | |||
fiel rector | |||
Division of Reactor Pr ram Management | |||
Office of Nuclear Reactor Regulation | |||
Technical contacts: Patrick M. Madden, NRR | |||
(301) 415-2854 Amarjit Singh, NRR | |||
(301) 415-1237 Attachments: | |||
1. Tables 1, 2, and 3, Summaries of Endurance Tests | |||
2. List of Recently Issued NRC Information Notices | |||
Att__Lament 1 K>_ IN 9-5-52 November 14, 1995 Tnhla 1 mnrmarv nf Anril 20. 1995 Fire Endurance Test | |||
Peak Seals - 3M Company 1-Hour Interam Fire Barriers | |||
Allowable single point unexposed-side temperature criterion - 399 F' | |||
Allowable average unexposed-side temperature criterion - 324 OF | |||
(Shading shows temperatures that exceeded, acceptance criteria of GL 86-10 Supplement 1) | |||
TEST SPECIMEN THERMOCOUPLE AVERAGE MAXIMUM REMARKS | |||
ILOCATIONS (OF)(F)} | |||
6" Cable tray Front side rail 262 338 Protected with three layers of | |||
Rear side rail J 262 337 Interam E53A. | |||
Met acceptance criteria. | |||
Copper conductor Ila | |||
24" Cable tray Front side rail Protected with four layers of | |||
Interam E53A. | |||
Rear side rail Exceeded the maximum single point | |||
temperature criterion at 50X minutes | |||
and the average temperature rise | |||
Copper conductor | |||
______________ .4 criterion at 54X minutes. | |||
5" Conduit Conduit surface 1 277 1 370 Protected with three layers of | |||
Interam E53A. | |||
Copper conductor I 217 275 Met acceptance criteria. | |||
3" Conduit Conduit surface Protected with three layers of | |||
Interarn E53A. | |||
Exceeded the maximum single point | |||
Copper conductor temperature criterion at 59 X minutes | |||
and the average temperature rise | |||
criterion at 53 X minutes. | |||
2" Conduit Conduit surface Protected with three layers of | |||
Interam E54A. | |||
Exceeded the maximum single point | |||
Copper conductor temperature criterion at 55X minutes | |||
and the average temperature rise | |||
criterion at 55 minutes. | |||
1- Conduit Conduit surface Protected with two layers of | |||
Interam E53A and an outer layer of | |||
Interam E54A. | |||
Exceeded maximum single point | |||
Copper conductor temperature criterion at 49X minutes | |||
and the average temperature rise | |||
I criterion at 52 minutes. | |||
_________________________________ | |||
2" air drop Copper conductor Protected with three layers of | |||
Interam E54A. | |||
Exceeded average temperature rise | |||
criterion at 59 minutes. | |||
_______ .- | |||
Junction box 2S7 311 Protected with three layers of | |||
Interam E54A. | |||
Met acceptance criteria. | |||
'Temperatures measured during testing and the acceptance temperatures are presented in aF in | |||
all Tables of this attachment to minimize error and confusion. | |||
Att.,,_ment 1 IN 95;-52 November 14, 1995 Table 2. Summary of May 17, 1995 Fire Endurance Test | |||
Peak Seals - 3M Company 1-Hour Interam Fire Barrier | |||
Allowable single point unexposed-side temperature criterion . 405 OF | |||
Allowable average unexposed-side temperature criterion - 330 OF | |||
TEST SPECIMEN THERMOCOUPLE AVERAGE MAXIMUM REMARKS | |||
LOCATIONS (OF) (OF' | |||
24" Cable tray Front side rail 290 389 Protected with three layers of 3M | |||
Interam E54A | |||
Rear side rail 301 354 Met acceptance criteria. | |||
Copper conductor 22265 l_______________ | |||
5' Conduit Conduit surface 224 251 Protected with three layers of E54A. | |||
Copper conductor 217 244 Met acceptance criteria. | |||
1" Conduit Conduit surface 308 374 Protected with three layers of E54A. | |||
Copper conductor 286 346 Met acceptance criteria. | |||
2" Air drop Copper conductor 242 279 Protected with three layers of | |||
Interam E54A. | |||
Met acceptance criteria. | |||
At lament 1 IN95-52 November 14, 1995 Table 3. Summary of July 7. 1995 Fire Endurance Test | |||
Peak Sea Is- 3M Company 3-Hour Interam Fire Barrier | |||
Allowable single ; piInt unexposed-side temperature criterion - 407 OF | |||
Allowable averal ge unexposed-side temperature criterloon - 332 OF | |||
(Shading shows temperature a that exceeded acceptance criteria of GL 86-10. Supplement 1) . | |||
TEST SPECIMEN THERMOCOUPLE AVERAGE MAXIMUM REMARKS | |||
LOCATIONS ([F) I (1F) I | |||
6" Cable tray Front side rail Protected with five layers of | |||
Interam E54A. Exceeded the | |||
Rear side rail maximum single point temperature | |||
criterion at 158 minutes and the | |||
average temperature rise criterion at | |||
Copper conductor 301 343 166 minutes. | |||
24" Cable tray Front side rail Protected with five layers of | |||
Interam E54A. Exceeded the | |||
Rear side rail 406 maximum single point temperature | |||
criterion at 176 minutes and the | |||
average temperature rise criterion at | |||
Copper conductor 243 334 167 minutes. | |||
5" Conduit Conduit surface Protected with five layers of | |||
Interam E54A. Exceeded the | |||
maximum single point temperature | |||
criterion at 161 minutes and the | |||
Copper conductor | |||
average temperature rise criterion at | |||
178 minutes. . | |||
3' Conduit Conduit surface Protected with five layers of | |||
Interam E54A. Exceeded the | |||
maximum single point temperature | |||
criterion at 148 minutes and the | |||
Copper conductor | |||
average temperature rise criterion at | |||
152 minutes. | |||
1" Conduit Conduit surface Protected with six layers of | |||
Interam E54A. Exceeded the | |||
maximum single point temperature | |||
criterion at 126 minutes and the | |||
Copper conductor sversge temperature rise criterion at | |||
167 minutes. . | |||
2" Air drop Copper conductor Protected with five layers of | |||
Interam E54A. Exceeded the | |||
maximum single point temperature | |||
criterion and the average temperature | |||
rise criterion at 152 minutes. | |||
. | |||
Junction box Metal surface Protected with six layers of | |||
Interam E54A. Exceeded the average | |||
temperature rise criterion at 165 minutes. | |||
< ~tachment 2 IN 95-52 November 14, 1995 LIST OF RECENTLY ISSUED | |||
NRC INFORMATION NOTICES | |||
Information Date of | |||
Notice No. Subject Issuance Issued to | |||
95-51 Recent Incidents Involving 10/27/95 All material and fuel | |||
Potential Loss of Control cycle licensees. | |||
of Licensed Material | |||
95-50 Safety Defect in Gammamed 10/30/95 All High Dose Rate | |||
12i Bronchial Catheter Afterloader (HDR) Adapters. | |||
Clamping Adapters | |||
95-49 Seismic Adequacy of 10/27/95 All holders of OLs or CPs | |||
Thermo-Lag Panels for nuclear power reactors. | |||
95-48 Results of Shift Staffing 10/10/95 All holders of OLs or CPs | |||
Study for nuclear power reactors. | |||
95-47 Unexpected Opening of a 10/04/95 All holders of OLs or CPs | |||
Safety/Relief Valve and for nuclear power reactors. | |||
Complications Involving | |||
Suppression Pool Cooling | |||
Strainer Blockage | |||
95-46 Unplanned, Undetected 10/06/95 All holders of OLs or CPs | |||
Release of Radioactivity for nuclear power reactors. | |||
from the Exhaust Ventilation | |||
System of a Boiling Water | |||
Reactor | |||
95-12, Potentially Nonconforming 10/05/95 All holders of OLs or CPs | |||
Supp. 1 Fasteners Supplied by for nuclear power reactors. | |||
A&G Engineering II, Inc. | |||
95-45 American Power Service 10/04/95 All holders of OLs or CPs | |||
Falsification of American for nuclear power reactors. | |||
Society for Nondestructive | |||
Testing (ASNT) Certificates | |||
95-44 Ensuring Compatible Use of 09/26/95 All Radiography Licensees. | |||
Drive Cables Incorporating | |||
Industrial Nuclear Company | |||
Ball-Type Male Connectors | |||
OL = Operating License | |||
CP = Construction Permit | |||
IN 95-52 November 14, 1995 This information notice requires 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 Regulation (NRR) project manager. | |||
orig /s/'d by DNCrutchfield | |||
Dennis M. Crutchfield, Director | |||
Division of Reactor Program Management | |||
Office of Nuclear Reactor Regulation | |||
Technical contacts: Patrick M. Madden, NRR | |||
(301) 415-2854 Amarjit Singh, NRR | |||
(301) 415-1237 Attachments: | |||
1. Tables 1, 2, anm 3, Summaries of Endurance Tests | |||
2. List of Recentl, Issued NRC Information Notices | |||
AWAS4 6'zp "' Ilke4- &&I-- | |||
TechEd reviewed this document on 9/11/95 DOCUMENT NAME: 95-52.IN | |||
IE Copy with attachmentlwclosure IN' - No copy | |||
To ,eceive a copy of this document, Indicate In the box: *C' a Copy Without attachientenctoSurM - | |||
iOFFICE PECB:DRPM* l C:PECB/DRPM* iI D/DRPV1J-n,1 A | |||
DMCruVif!el d | |||
NAME IJCarter IAEChaffee | |||
DATE 09/28/95 11/02/95 111/ /95 OFFICIAL RECORD COPY | |||
IN 95-xx | |||
November xx, 1995 This Information notice requires 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 Regulation (NRR) project manager. | |||
Dennis M. Crutchfield, Director | |||
Division of Reactor Program Management | |||
Office of Nuclear Reactor Regulation | |||
Technical contacts: Patrick M. Madden, NRR | |||
(301) 415-2854 Amarjit Singh, NRR | |||
(301) 415-1237 Attachments: | |||
1. Tables 1, 2, and 3, Summaries of Endurance Tests | |||
2. List of Recently Issued NRC Information Notices | |||
DOCUMENT NAME: G:\IN\3MIN | |||
'Ew | |||
* Copy with attachmentoneloesure .N. . No copy | |||
To mcev. a copy of Wehdocunnt. inducate I the box: IC' - Copy without attachment/encloss | |||
OFFICE SPLB:DSSA* I ADM:PUB* PECB:DRPM* I C:PER RRPM | |||
NAME ASingh Tech Editor JCarter/RLD A~hOW | |||
DATE 09/28/95 109/11/95 l09/28/95 ti/ 2 /g§PL3 OFFICE ID:DRPM/NRR I II | |||
!NAME 1DPMCrutchfield | |||
JDATE I1 4 ! !J5I~~ | |||
OFFICIAL RECORD COPY | |||
IN95-xx | |||
September xx, 1995 This information notice requires 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 Regulation (NRR) project manager. | |||
Dennis M. Crutchfield, Director | |||
Division of Reactor Program Management | |||
Office of Nuclear Reactor Regulation | |||
Technical contacts: Patrick M. Madden, NRR | |||
(301) 415-2854 Amarjit Singh, NRR | |||
(301) 415-1237 Attachments: | |||
1. Tables 1, 2, and 3, Summaries of Endurance Tests | |||
2. List of Recently Issued NRC Information Notices | |||
IN | DOCUMENT NAME: G:\IN\3M I.I ( .or 'ff- | ||
===To rete a copy o docunwra=== | |||
o j2 box: 'C' - Copy wfthout anachmnten cosL 'E' - Copy with atchmentlenciosure '' - No copy | |||
OFFICE SPLB:DSS\A1, 'I ] ADM:PUB* I IP fTRPM I PECB/DRPM Z I I C:PECB/DRPM I | |||
NAME ASingh ) A Tech Editor IJZarter RJKi I.fT | |||
AChaffee | |||
DATE m 95 109/11/95 /95 O&5 OFFICE D:DRPM/NRR I I | |||
}} | |||
NAME DMCrutchfleld | |||
DATE 09/ /__ | |||
95_I | |||
OFFICIAL RECORD COPY}} | |||
{{Information notice-Nav}} | {{Information notice-Nav}} |
Latest revision as of 04:36, 24 November 2019
UNITED STATES
NUCLEAR REGULATORY COMMISSION
OFFICE OF NUCLEAR REACTOR REGULATION
WASHINGTON, D.C. 20555-0001 November 14, 1995 NRC INFORMATION NOTICE 95-52: FIRE ENDURANCE TEST RESULTS FOR ELECTRICAL
RACEWAY FIRE BARRIER SYSTEMS CONSTRUCTED FROM
3M COMPANY INTERAM FIRE BARRIER MATERIALS
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 inform addressees of the results of recent fire endurance tests for
electrical raceway fire barrier systems constructed from 3M Company Interam
fire barrier materials. It is expected that recipients will review the
information for applicability to their facilities and consider this
information, as appropriate, in their review of Interam fire barriers.
Backaround
On April 20, May 17, and July 7, 1995, the NRC staff visited Omega Point
Laboratories (OPL), San Antonio, Texas, to witness full-scale fire endurance
tests for electrical raceway fire barrier systems constructed from 3M Company
Interam fire barrier materials. These tests were sponsored by Peak Seals
Corporation (Peak Seals). Peak Seals informed the NRC staff that the test
specimens included in this test program were intended to represent generic
Interam fire barrier systems and that these test programs were conducted in
accordance with Generic Letter (GL) 86-10, Supplement 1, 'Fire Endurance Test
Acceptance Criteria for Fire Barrier Systems Used To Separate Redundant Safe
Shutdown Trains Within the Same Fire Area." The following information is
based on observations made by the NRC staff who witnessed these fire tests.
The NRC staff has not reviewed the test reports.
Description of Circumstances
1-Hour Fire Endurance Tests
The first test assembly included nominal 24-inch and 6-inch-wide steel cable
trays; 1-inch, 2-inch, 3-inch, and 5-inch-diameter steel conduits; a 2-inch
diameter air drop; each was arranged in a U-shaped configuration; and a
12-inch by 12-inch by 8-inch steel junction box. With regard to the 2-inch- diameter steel conduit, the Junction box was installed in one of its vertical
runs and the 2-inch diameter air drop was installed in the other. These test
specimens did not include cable fill and were supported by a common trapeze
9511080324- K4 //
6t~zEzt-0 t f51(14
IN 95-52 November 14, 1995 support. They were protected with three layers of Interam E53A fire barrier
mat material. Each layer was 7.6 mm [0.3 inch] thick.
On April 20, 1995, OPL subjected the test assembly to the test fire specified
in American Society for Testing and Materials (ASTM) Standard E-119, "Fire
Test of Building Construction and Materials," for 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />. After the fire
exposure, the test specimens were subjected to a fog-nozzle hose stream test.
The 24-inch-wide cable tray; the 3-inch-, 2-inch-, and 1-inch-diameter
conduits; and the air drop exceeded the temperature rise acceptance criteria
of GL 86-10, Supplement 1, near the end of the 1-hour fire exposure. None of
the barriers burned through during the fire exposure nor were they breached by
the hose stream. Table 1 (see Attachment 1) summarizes the test specimen and
fire barrier configurations and the results of the April 20, 1995, test.
The second test assembly included a 24-inch-wide steel cable tray, 1-inch- and
5-inch-diameter steel conduits, and a 2-inch-diameter air drop. These test
specimens did not contain cables and were protected with three layers of
Interam E54A fire barrier mat material. Each layer was 10 mm [0.4 inch]
thick.
On May 17, 1995, OPL subjected the test assembly to the test fire specified in
ASTM Standard E-119 for 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />. After the fire exposure, it subjected the
test specimens to a fog-nozzle hose stream test. These 1-hour test specimens
met the acceptance criteria of Supplement 1 to GL 86-10. Table 2 (see
Attachment 1) summarizes the test specimen and fire barrier configurations and
the results of the May 17, 1995, test.
3-Hour Fire Endurance Test
The third test assembly included nominal 24-inch- and 6-inch-wide steel cable
trays; nominal 1-inch-, 3-inch-, and 5-inch-diameter steel conduits; a 2-inch- diameter air drop; each was arranged in a U-shaped configuration; and a
nominal 12-inch by 12-inch by 8-inch steel junction box. The cable trays were
filled with a single layer of mix cables. The cable trays, the 1-inch- and
3-inch-diameter steel conduits, and the air drop were protected with five
layers of Interam E54A fire barrier mat material. The 5-inch-diameter conduit
and the Junction box were protected with six layers of Interam E54A fire
barrier mat material. Each layer was 10 mm [0.4 inch] thick.
On July 7, 1995, OPL subjected the test assembly to the test fire specified in
ASTM Standard E-119 for 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />. After the fire exposure, it subjected the
test specimens to a fog-nozzle hose stream test. The barriers did not burn
through during the fire exposure, nor were they breached by the hose stream.
There was no visible damage to the test specimen cables. However, all of the
test specimens exceeded the temperature rise acceptance criteria of GL 86-10,
Supplement 1. Table 3 (see Attachment 1) summarizes the test specimen and
fire barrier configurations and the results of the July 7, 1995 test.
Discussion
Section 50.48 of Title 10 of the Code of Federal Regulations requires that
each operating nuclear power plant must have a fire protection plan that
IN 95-52 November 14, 1995 satisfies General Design Criterion (GDC) 3 of Appendix A to 10 CFR Part 50.
Fire protection features required to satisfy GDC 3 include features to ensure
that one train of systems necessary to achieve and maintain shutdown
conditions is free of fire damage. One means of satisfying this requirement
is to separate one safe shutdown train from its redundant train with a fire- rated barrier. The level of fire resistance required of the barrier, 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />
or 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />, depends on the other fire protection features in the fire area.
The NRC issued guidance on acceptable methods of satisfying the regulatory
requirements of GDC 3 in Branch Technical Position (BTP) Auxiliary and Power
Conversion Systems Branch (APCSB) 9.5-1, 'Guidelines for Fire Protection for
Nuclear Power Plants"; Appendix A to BTP APCSB 9.5-1; BTP Chemical Engineering
Branch (CMEB) 9.5-1, "Fire Protection for Nuclear Power Plants"; and GL 86-10,
"Implementation of Fire Protection Requirements." These guidance documents
state that the fire resistance ratings of fire barriers should be established
in accordance with National Fire Protection Association (NFPA) Standard 251,
"Standard Methods of Fire Tests of Building Construction and Materials"
(1975), by subjecting a representative test specimen to a standard fire
exposure.
On March 25, 1994, the NRC issued Supplement 1 to GL 86-10 to (1) clarify the
applicability of the test acceptance criteria in GL 86-10 to raceway fire
barrier systems, (2) specify a set of fire endurance test acceptance criteria
that are acceptable for demonstrating that fire barrier systems can perform
the required fire-resistive function and maintain the protected safe shutdown
train free of fire damage, (3) specify acceptable options for hose stream
testing, and (4) specify criteria for cable functionality testing when a
deviation is necessary, such as when the fire barrier temperature rise
criteria are exceeded or the test specimen cables sustain visible damage.
These positions are incorporated by the NRC staff in its review and evaluation
of the adequacy of fire endurance tests and fire barrier systems proposed by
licensees or applicants to satisfy existing NRC fire protection rules and
regulations.
Some temperatures observed during the tests exceeded the maximum allowable
temperature acceptance criteria of Supplement 1 to GL 86-10. In accordance
with this supplement, an engineering evaluation could be performed to
determine the acceptability of an in-plant Interam fire barrier that was
bounded by a deviating test specimen configuration. Information about such
evaluations can be found in Enclosure 2 of Supplement 1 to GL 86-10. By
letter dated August 7, 1995 [accession number 9509050173 ], Peak Seals
submitted to the NRC staff additional documentation relating to the thermal
performance of the 3-hour fire barrier test specimens for information.
1 NFPA adopted ASTM Standard E-119 as NFPA Standard 251.
IN 95-52 November 14, 1995 This information notice requires 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 Regulation (NRR) project manager.
fiel rector
Division of Reactor Pr ram Management
Office of Nuclear Reactor Regulation
Technical contacts: Patrick M. Madden, NRR
(301) 415-2854 Amarjit Singh, NRR
(301) 415-1237 Attachments:
1. Tables 1, 2, and 3, Summaries of Endurance Tests
2. List of Recently Issued NRC Information Notices
Att__Lament 1 K>_ IN 9-5-52 November 14, 1995 Tnhla 1 mnrmarv nf Anril 20. 1995 Fire Endurance Test
Peak Seals - 3M Company 1-Hour Interam Fire Barriers
Allowable single point unexposed-side temperature criterion - 399 F'
Allowable average unexposed-side temperature criterion - 324 OF
(Shading shows temperatures that exceeded, acceptance criteria of GL 86-10 Supplement 1)
TEST SPECIMEN THERMOCOUPLE AVERAGE MAXIMUM REMARKS
ILOCATIONS (OF)(F)}
6" Cable tray Front side rail 262 338 Protected with three layers of
Rear side rail J 262 337 Interam E53A.
Met acceptance criteria.
Copper conductor Ila
24" Cable tray Front side rail Protected with four layers of
Interam E53A.
Rear side rail Exceeded the maximum single point
temperature criterion at 50X minutes
and the average temperature rise
Copper conductor
______________ .4 criterion at 54X minutes.
5" Conduit Conduit surface 1 277 1 370 Protected with three layers of
Interam E53A.
Copper conductor I 217 275 Met acceptance criteria.
3" Conduit Conduit surface Protected with three layers of
Interarn E53A.
Exceeded the maximum single point
Copper conductor temperature criterion at 59 X minutes
and the average temperature rise
criterion at 53 X minutes.
2" Conduit Conduit surface Protected with three layers of
Interam E54A.
Exceeded the maximum single point
Copper conductor temperature criterion at 55X minutes
and the average temperature rise
criterion at 55 minutes.
1- Conduit Conduit surface Protected with two layers of
Interam E53A and an outer layer of
Interam E54A.
Exceeded maximum single point
Copper conductor temperature criterion at 49X minutes
and the average temperature rise
I criterion at 52 minutes.
_________________________________
2" air drop Copper conductor Protected with three layers of
Interam E54A.
Exceeded average temperature rise
criterion at 59 minutes.
_______ .-
Junction box 2S7 311 Protected with three layers of
Interam E54A.
Met acceptance criteria.
'Temperatures measured during testing and the acceptance temperatures are presented in aF in
all Tables of this attachment to minimize error and confusion.
Att.,,_ment 1 IN 95;-52 November 14, 1995 Table 2. Summary of May 17, 1995 Fire Endurance Test
Peak Seals - 3M Company 1-Hour Interam Fire Barrier
Allowable single point unexposed-side temperature criterion . 405 OF
Allowable average unexposed-side temperature criterion - 330 OF
TEST SPECIMEN THERMOCOUPLE AVERAGE MAXIMUM REMARKS
LOCATIONS (OF) (OF'
24" Cable tray Front side rail 290 389 Protected with three layers of 3M
Interam E54A
Rear side rail 301 354 Met acceptance criteria.
Copper conductor 22265 l_______________
5' Conduit Conduit surface 224 251 Protected with three layers of E54A.
Copper conductor 217 244 Met acceptance criteria.
1" Conduit Conduit surface 308 374 Protected with three layers of E54A.
Copper conductor 286 346 Met acceptance criteria.
2" Air drop Copper conductor 242 279 Protected with three layers of
Interam E54A.
Met acceptance criteria.
At lament 1 IN95-52 November 14, 1995 Table 3. Summary of July 7. 1995 Fire Endurance Test
Peak Sea Is- 3M Company 3-Hour Interam Fire Barrier
Allowable single ; piInt unexposed-side temperature criterion - 407 OF
Allowable averal ge unexposed-side temperature criterloon - 332 OF
(Shading shows temperature a that exceeded acceptance criteria of GL 86-10. Supplement 1) .
TEST SPECIMEN THERMOCOUPLE AVERAGE MAXIMUM REMARKS
LOCATIONS ([F) I (1F) I
6" Cable tray Front side rail Protected with five layers of
Interam E54A. Exceeded the
Rear side rail maximum single point temperature
criterion at 158 minutes and the
average temperature rise criterion at
Copper conductor 301 343 166 minutes.
24" Cable tray Front side rail Protected with five layers of
Interam E54A. Exceeded the
Rear side rail 406 maximum single point temperature
criterion at 176 minutes and the
average temperature rise criterion at
Copper conductor 243 334 167 minutes.
5" Conduit Conduit surface Protected with five layers of
Interam E54A. Exceeded the
maximum single point temperature
criterion at 161 minutes and the
Copper conductor
average temperature rise criterion at
178 minutes. .
3' Conduit Conduit surface Protected with five layers of
Interam E54A. Exceeded the
maximum single point temperature
criterion at 148 minutes and the
Copper conductor
average temperature rise criterion at
152 minutes.
1" Conduit Conduit surface Protected with six layers of
Interam E54A. Exceeded the
maximum single point temperature
criterion at 126 minutes and the
Copper conductor sversge temperature rise criterion at
167 minutes. .
2" Air drop Copper conductor Protected with five layers of
Interam E54A. Exceeded the
maximum single point temperature
criterion and the average temperature
rise criterion at 152 minutes.
.
Junction box Metal surface Protected with six layers of
Interam E54A. Exceeded the average
temperature rise criterion at 165 minutes.
< ~tachment 2 IN 95-52 November 14, 1995 LIST OF RECENTLY ISSUED
NRC INFORMATION NOTICES
Information Date of
Notice No. Subject Issuance Issued to
95-51 Recent Incidents Involving 10/27/95 All material and fuel
Potential Loss of Control cycle licensees.
of Licensed Material
95-50 Safety Defect in Gammamed 10/30/95 All High Dose Rate
12i Bronchial Catheter Afterloader (HDR) Adapters.
Clamping Adapters
95-49 Seismic Adequacy of 10/27/95 All holders of OLs or CPs
Thermo-Lag Panels for nuclear power reactors.
95-48 Results of Shift Staffing 10/10/95 All holders of OLs or CPs
Study for nuclear power reactors.
95-47 Unexpected Opening of a 10/04/95 All holders of OLs or CPs
Safety/Relief Valve and for nuclear power reactors.
Complications Involving
Suppression Pool Cooling
Strainer Blockage
95-46 Unplanned, Undetected 10/06/95 All holders of OLs or CPs
Release of Radioactivity for nuclear power reactors.
from the Exhaust Ventilation
System of a Boiling Water
Reactor
95-12, Potentially Nonconforming 10/05/95 All holders of OLs or CPs
Supp. 1 Fasteners Supplied by for nuclear power reactors.
A&G Engineering II, Inc.
95-45 American Power Service 10/04/95 All holders of OLs or CPs
Falsification of American for nuclear power reactors.
Society for Nondestructive
Testing (ASNT) Certificates
95-44 Ensuring Compatible Use of 09/26/95 All Radiography Licensees.
Drive Cables Incorporating
Industrial Nuclear Company
Ball-Type Male Connectors
OL = Operating License
CP = Construction Permit
IN 95-52 November 14, 1995 This information notice requires 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 Regulation (NRR) project manager.
orig /s/'d by DNCrutchfield
Dennis M. Crutchfield, Director
Division of Reactor Program Management
Office of Nuclear Reactor Regulation
Technical contacts: Patrick M. Madden, NRR
(301) 415-2854 Amarjit Singh, NRR
(301) 415-1237 Attachments:
1. Tables 1, 2, anm 3, Summaries of Endurance Tests
2. List of Recentl, Issued NRC Information Notices
AWAS4 6'zp "' Ilke4- &&I--
TechEd reviewed this document on 9/11/95 DOCUMENT NAME: 95-52.IN
IE Copy with attachmentlwclosure IN' - No copy
To ,eceive a copy of this document, Indicate In the box: *C' a Copy Without attachientenctoSurM -
iOFFICE PECB:DRPM* l C:PECB/DRPM* iI D/DRPV1J-n,1 A
DMCruVif!el d
NAME IJCarter IAEChaffee
DATE 09/28/95 11/02/95 111/ /95 OFFICIAL RECORD COPY
IN 95-xx
November xx, 1995 This Information notice requires 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 Regulation (NRR) project manager.
Dennis M. Crutchfield, Director
Division of Reactor Program Management
Office of Nuclear Reactor Regulation
Technical contacts: Patrick M. Madden, NRR
(301) 415-2854 Amarjit Singh, NRR
(301) 415-1237 Attachments:
1. Tables 1, 2, and 3, Summaries of Endurance Tests
2. List of Recently Issued NRC Information Notices
DOCUMENT NAME: G:\IN\3MIN
'Ew
- Copy with attachmentoneloesure .N. . No copy
To mcev. a copy of Wehdocunnt. inducate I the box: IC' - Copy without attachment/encloss
OFFICE SPLB:DSSA* I ADM:PUB* PECB:DRPM* I C:PER RRPM
NAME ASingh Tech Editor JCarter/RLD A~hOW
DATE 09/28/95 109/11/95 l09/28/95 ti/ 2 /g§PL3 OFFICE ID:DRPM/NRR I II
!NAME 1DPMCrutchfield
JDATE I1 4 ! !J5I~~
OFFICIAL RECORD COPY
IN95-xx
September xx, 1995 This information notice requires 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 Regulation (NRR) project manager.
Dennis M. Crutchfield, Director
Division of Reactor Program Management
Office of Nuclear Reactor Regulation
Technical contacts: Patrick M. Madden, NRR
(301) 415-2854 Amarjit Singh, NRR
(301) 415-1237 Attachments:
1. Tables 1, 2, and 3, Summaries of Endurance Tests
2. List of Recently Issued NRC Information Notices
DOCUMENT NAME: G:\IN\3M I.I ( .or 'ff-
To rete a copy o docunwra
o j2 box: 'C' - Copy wfthout anachmnten cosL 'E' - Copy with atchmentlenciosure - No copy
OFFICE SPLB:DSS\A1, 'I ] ADM:PUB* I IP fTRPM I PECB/DRPM Z I I C:PECB/DRPM I
NAME ASingh ) A Tech Editor IJZarter RJKi I.fT
AChaffee
DATE m 95 109/11/95 /95 O&5 OFFICE D:DRPM/NRR I I
NAME DMCrutchfleld
DATE 09/ /__
95_I
OFFICIAL RECORD COPY