ML20106B913
| ML20106B913 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 09/25/1992 |
| From: | J. J. Barton GENERAL PUBLIC UTILITIES CORP. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| C321-92-2263, IEB-92-001, IEB-92-1, NUDOCS 9210050272 | |
| Download: ML20106B913 (8) | |
Text
-_
l 1
GPU Nuclear Corporsuon 50,0 Nuclear
= e 388 Forkea Rier. New Jersey o87310388 cn3 9714000 Wrier s D rect Dia' Numtier September 25, 1992
'321-92-2263 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C.
20555 e
Gentlemen:
Subject:
Oyster Creek Nuclear Generating Station Docket No. 50-219 Response to NRC Bulletin 92-01, Supplement 1 Ref:
(1)
NRC Bulletin 92 01, Supplemeni. 1, " Failure of Thermo-Lag 330 Fire Barrier System to perform Its Specified Fire Endurance function", dated August 28, 1902.
(2)
NRC letter from A.W. Dromerick to J.J. Barton, dated August 25, 1992.
(3)
GpVN letter C321-92-2209 from J.J. Barton to NRC Document Control Desk, dated July 24, 1992.
In accordance with the requested actions of NRC Bulletin 92-01, Supriement 1, (Ref. 1) this letter identifies (1) the areas of the plant which have Therma-Lag 330 fire barrier material installed for the protection and separation of the safe shutdown capability, (2) compensatory measures implemented in response to the bulletin supplement, and (3) measures being taken to ensure or restore fire barrier operability. The requested actions are assentially the same as those listed in Bulletin 92-01, but the scope has be:* expanded to include all sizes of conduits and trays, and to include walls, ceilings, and equipment encic ures.
This letter also replies to NRC letter dated August 25, 1992 (Ref. 2) wi.ich addressed our response to Bulletin 92-01 (Ref. 3).
Thermo-Lag 330 fire barriers have been installed at Oyster Creek to protect conduit, drywell penetrations, and an HVAC duct, and also to form a 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> fire rated stairwell enclosure; no cable trays were protected.
There are 15 locations within the reactor building, turbine building and office building where Thermo-Lag is installed.
These 15 locations are within 7 fire zones identified as TB-FZ-llc, TB-FZ-llD, RB-FZ-lF2, RB-FZ-lD, RB-FZ-lE, 08-FZ-6A, and OB-FZ-6B.
Specific equipment protected in each fire zone is identified in.
This is the same listing previously provided in our response to Bulletir 92-01.
9210050272 920925 PDR ADOCK 05000219 v
i G
PDR hi g
y
.e N_ c__ _ e_ c_
1
C321-92-2263 Page 2 of 3 1
Immediately upon receivhg the bulletin supplement, we evaluated the irformation provided.
In accordance with the requested actions of the bulletin supplement, the hourly fire watch patrols, which were already patrolling locations where Thermo Lag is installed to protect conduit, were expanded to include coverage of the drywell penetrations HVAC. duct, and the i
stairwell enclosure.
In our response to Bulletin 92 01, we stated an hou,'ly fire watch patrol is the compensatory r,casure required by plant technical specification 3.12.E for a non-functional fire barrier (assuming the fire etectors on at least one side of the non functional bterier are operable).
This point requires some clarification. Technical specification 3.12.E applies-only to fire barriers in walls, ceilings and floors that separate fire areas, and does not apply to Thermo-Lag envelope systems protecting conduit, However, the standard fire protection license condition in section 2.C(3) of the license requires implementation of the Oyster Creek Fire Protection Program t,hich includes Station Procedure 101.2, " fire protection Program", and Procedure 101.2 requires an hourly fire watch patrol as a compensatory measure for non-functional " fire rated assemblies". All Thermo-Lag envelope-systems are-considered fire rated assemblies.
Therefore, although different documents govern the compensatory measures to be taken depending on the specific Thermo-Lag application, the required compensatory measures are currently the same.
GPUN submitted a technical specification change request (TSCR No.193) on April 20, 1992 to delete the fire prctection requirements in the technical specifications which wsre incorporated into Procedure 101.2 in accordance with Generic Letter 88-12, " Removal of fire Protection Requirements from Technical Specifications".
These requirements will be greatly simplified when TSCR 193 is approved by the NRC.
In a telephone conversation on August 24, 1992, and by letter dated August 25, 1992 (Ref.2), the NRC stated the barriert should be considered inoperable unless there is plant specific test data, other than the data identified in Information Notice 92-46 (i.e.,
aerformed by Industrial Testing Laboratories, Inc.), that confirms the 1 or 3 leur fire endurance rating.
The letter states, "The specified function of a fire barrier system is to endure a fire exposure with severity of either l-or 3-hours, and properly protect the
..i shutdown function on the unexposed side of the fire barrier",
In spite of the actions taken, GPUN believes the function of a fire barrier system is to ensure the cable or component being protected will remain functional in the event of a fire. We believe it is incorrect to assert that the functton of a fire barrier is to comply with the 1 or 3_ hour: fire endurance _ rating specified in 10 CFR 50, Appendix R, Section Ill.G. With sufficient engineering-justification, licensees should'have the latitude to i
declare the fire barriers operable (capable of performing their intended l
function). We believe this approach _is consistent with the guidance provided l
in Generic Letter 91-18, " Resolution of Degraded and Nonconforming Conditions _.
1 and Operability Determinations".
c.,. _
C321-92-22G5 Page 3 of 3 At this time, we are complying with the NRC cosition stated above.
Accordingly, compensatory measures for inoperable fire barriers are in place.
These compensatory measures are expected to remain in place until the fire barriers can be declared operable or testing demonstrates successful 1 or 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> barrier performance.
GPUN will continue to evaluate information regarding the Thermo-Lag 330 fire barrier material as it becomes available. Actions to restore (or confirm) fine barrier operability are being developed through an industry program being coordinated by NUMARC.
We will apply the results of the NUMARC program, as appropriate, to the Thermo-Lag fire barriers installed at Oyster Creek.
As requested, Attachment 2 provides an estimate of the time and costs incurred by Oyster Creek in complying with the requested actions of Bulletin 92-01 and the supplement.
If there are any questions regarding this matter, please call Mr. Michael Heller, Licensing Engineer, at (609) 971-4680.
Sincerely, m
{
N L^Jk N
5 J. Barton O
- Vice President and Director Oyster Creek s
f l
Sworn and Subscribed to before me this R i day of (1992.
AA b&
l.
fotaryPublicofNewJersey JUolTH M. Cn0WE
!)utary Public of NewJerse]N9 {
an;n Expires -
//
cc:
Administrator, NRC Region 1 NRC Resident inspector Oyster Creek NRC Project Manager i
t
Oyster Creek Thermo-Lac 330 Fire Barrier Installations FIRL' ZONE / LOCATION CONDUIT 0R SIZE T-LAG CIRCUIT #
DESCRIPTION PENETRATION #
RATING
=m TB-FZ-IIC 86-71 4"
3 Hr 86-71 Power Feed Circuit to Switchgear ID
]
4160V Switchgear.Rm Turbine Bldg Elev-23'-6" TB-FZ-IID 86-71 4"
1 Hr 86-71 Power Feed Circuit to Switchgear ID CGCTB071 1"
I l'r 86-66 EDG 2 Differential Prot Ckt Base een Elev 3'-6" CGCTB017 1"
1 Hr 86-GC0016 EDG 2 Differential Prot Ckt CGCTB030 1%"
1 Hr 62-93 125V DC Dist Ctr "B" to 460V USSIB3 CSCTB029 1"
1 Hr 62-100-125V DC Dist Ctr "B" to 460V Swgr ID CGCTB020 1%"
1 Hr 62-93 125V DC Dist Ctr "B" to 460V USSIB 62-100 125Y DC Dist Ctr "B" to 460V Swgr 103 14-25 3%"
1 Hr 14-25 Power Feed Circuit to USSIB2 14-28 2%"
1 Hr 14-28 Power Feed Circuit to USSIB3 g_
RB-FZ-IF2 CGPA2002 1%"
1 Hr 62GP0228 125V DC'Dist Ctr "B" to 460V USSIB Reactor Bldg 62GP0229
.125V DC Dist Ctr "B" to 460V Swgr 103 SW Corner Room Elev (-)19' RB-FZ-ID CGXA3028 1"
1 Hr 82GX0849 Indicator Ckt (LT/IG068)
CGCA1027 2"
1 Hr 22GCl259 Position' Indicator (V-14-32) fv51'
^
22GCl258 Control Ckt (V-14-37) 21GC2671 Valve Power / Control Ckt (V-Il-34)62-153 2"
1 Hr 62-153 125V DC Dist Ctr "C" to HCC-DC2 I
.. _--l
t j
FIRE ZONE / LOCATION
' CONDUIT OR SIZE T-LAG CIRCUIT #
' DESCRIPTION PENETRATION #
RATING I
I RB-FZ-1D (Cont)
CRCA1026 2*
1 Hr 63RC0712 Control and Ind Ckt (V-14-35)
Reactor Bldg 63RC0713
- Control and Ind Ckt (V-14-35)
Elev 51' 63RC0710 Control and Ind Ckt (V-14-33) i-63RC0711 Control and Ind Ckt (V-14-33)
CGPA3026 2"
1 Hr 12GP0816 Power Ckt (V-14-37) 3 12GP0817 Power Ckt (V-14-32)
CGCR3021 1"
1 Hr 22GCl258
' Control Ckt (V-14-37)
CGCR2086 1"
1 Hr 22GCl298 Valve Ckt (V-16-1)
RB-FZ-lE:
CRCA1026 2"
1 Hr 63RC0710 Control & Ind Ckt (V-14-33)
Reactor Bldg 63RC0711 Control & Ind Ckt (V-14-33)
Elev 23' 63RC0712 Control & Ind Ckt (V-14-35) 63RC0713 Control & Ind Ckt (V-14-35) j 62-153 2"
1 Hr 62-153 125V DC Dist Ctr "C" to MCC-DC2 i
CGCA2010 1%"
1 Hr 63GP0749 Control Ckt (V-16-12) l 63GC0751 Control Ckt (V-16-14) 63GP0744 Control Ckt for PS-215-1044 l
CGPA2008 3"
1 Hr 62GP0225 Power Feed Ckt (V-16-2) j 62GP0226 Power Feed Ckt (V-16-14)
I' Penetration 8, NA 1 Hr NA Electrical penetration boxes enclosed by
- 9. 18 & 19 Thermo-Lag. Mounted on drywell wall.
CGCR3021
'1" 1 Hr 22GCl258 Control Ckt (V-14-37) i CGPR3019 1"
1 Hr 12-GP0816 Valve Power Feed Ckt (V-14-37) j.
CRXR2050 1"
1 Hr 82-598 TE-58 Channel "B" Circuit i
L 4
i n
+
--- a
l-lFIREZONE/ LOCATIONCONDUIT OR SIZE T-LAG CIRCUIT #
DESCRIPTION l
RATING RB-FZ-1E (Cont)
NA NA 1 Hr NA Thermo-Lag on steel enclosure over stairwell to Northeast Corner Room.
Reactor Bldg Fenetration 44 NA 1 Hr NA Electrical penetration boxes enclosed by Thermo-lag. Mounted on drywell wall.
& 54 08-FZ-6A CNXA 1125 2"
1 Hr 822X0830 Process Inst Ckt (DPT-622-1008) 822X0831 Process Inst Ckt (DFT-622-1009) l 480V Switchgear Rm 822X0829 Process Inst Ckt (PT-622-1018)
U Office Bldg 832X0403 Process Inst Ckt (TE-622-1020)
Elev 23'-6" 832X0404 Process Inst Ckt (TE-622-1021) 822X0835 Process Inst Ckt (DPT-622-1010) 822X0836 Process Inst Ckt (DPT-622-10ll) 822X0834 Process Inst Ckt (PT-622-1019) 08-FZ-6B CNPA1042 1"
1 Hr 12NP0826 Power Feed (FN-56-004) 12NP0825 Power Feed (FN-56-007) 480V Switchgear Rm CNCA1043 3"
1 Hr 22NL1241 Control Ckt (FN-56-004/007)
Office Bldg Elev 23'-6" CNCA1041 3"
1 Hr 22 hcl 241 Control Ckt (FN-56-004/007)
CNCA1040 2"
1 Hr 2:2c2674 Control Ckt for DM56-015 212C2681 Control Ckt fr-Damper DM56-017 222Cl243 Control Ckt for Alt Fan FN56-008 21NC2678 Control Feed from LSP-1A2 71NC0802 Alarm Ckt for RSP 71NC0809 Alarm Ckt for LSP-1A2
)62-173 2"
1 Hr 62-173 Conduit is within Thermo-Lag enclosure l
of adjacent conduit.
Protection not I
required for this circuit.
I 12-604 2"
1 Hr 12-604 "C" Battery Room Ventilation l
FIRE ZONE / LOCATION CONDUIT OR SIZE T-LAG CIRCUIT #
DESCRIPTION PENETRATION #
RATING l
08-FZ-68 (Cont)62-161 2"
1 Hr 62-161 125V DC Dist Ctr "C" to Panel DC-F 480V Svitchaear Rm Office Bldg ~
62-158 2"
1 Hr 62-158 125V DC Dist Ctr "C" to USSIA2 12-603 2"
1 Hr 12-603 Mtr Fdr Ckt "C" Battery Room Vent Fan II l
~ "12-602 2"
1 Hr 12-602 Mtr Fdr Ckt "C" Battery Room Vent j
12-601 2"
1 Hr 12-601 460V Power Feed to "C2" Battery Room l
12-600 2"
1 Hr 12-600 460V Power Feed to "Cl" Battery Charger 22-1126 3"
1 Hr 22-1120 Fan 2 Control "C Battery Room 22-1119 Fan 1 Control "C" Battery Room 11-861 Fan Control Powe; "C" Battery Room CGPA-1044 1"
1 Hr fl2P1406 Halon Power Feed from Insc Panel 4C l
NA NA 1 Hr NA HVAC Duct with Thermo-Lag i
Rylletin 92-01 Com.pliance Cost Estimate for Oyster Creek (As of September 25, 1992)
Provided belts is an estimate of the time and costs incurred by Oyster Creek in complying with Bulletin 92-01 and the supplement as of September 25, 1992.
The 4 categories addressed below are as specified in the bulletin.
(1)
The licensee staff's time and costs to perform requested inspections, corrective actions, and associated testing:
To date, approximately 28 person-hours and $956.
(2)
The licenseo staff's time and costs to prepare the requested reports and documentation:
To date, approximately 574 person-hours and $18,235.
(3)
The additional short-term costs incurred to address the inspe; tion findings such as the costs of the corrective actions or the costs of down time:
To date, approximately 2200 person-hours and $22,000. This is the cost for implementing the hourly fire watch patrols as a compensatory measure.
Currently, 4 temporary personnel are performing this duty on a rotating basis.
(4)
An estimate of the additional long-term costs that will be incurred as a result of impicmenting commitments such as the estimated costs of conducting future inspections or increased maintenance:
Until a permanent resolution to the Thermo-lag issue is implemented, it is likely the hourly fire watch patrols will continue at a cost of $240 per day.
Assuming a permanent fix is implemented in the cycle 15 refueling outage, the cost for the fire watch patrols alone will total approximately $175,200.
The cost of the actual repair / replacement, if required, is unknown.
- -, - - - -., -