ML20008E438
| ML20008E438 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 02/06/1981 |
| From: | Feit R NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| To: | Farmer W NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| References | |
| FOIA-81-204 NUDOCS 8102230850 | |
| Download: ML20008E438 (5) | |
Text
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Tistritation:
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RFett 1:SFcroar FP Dist List IDOPRDUit f0Ts:
U. S. Farmr. Acting Chief Plant Instru:v.atation. Control &
Fouer Systeas r,rcach Division of Reactor Safety Research FT,0I:
!!. F e i t Plant Instrur -ntation. Control &
Power Systc.s tranch Division of Reactor Safety Rcscarch i
SCJECT:
TRIP REPORT TO U QEP.1?. ITER LADOP.ATURIES is :c/ trip report to Unden riter Lcherctories on January 15, 1951 to discuss the Orcuns Fcrry F.cplication Fire T:st.
Er closure 2 is the list of attenics frca that ruating.
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R. Feit Plant Instrun:ntation, Centrol &
Power Systcr.s tronch Division of Reactor Safety P.cscarch
Enclosures:
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C TRIP REPORT FEB 0 EUI Date:
January 15, 1981 Place: Underwritey Lcboratories, florthbrook, Illinois
SUBJECT:
REPLICATION FIRE TEST The purpose of the Fire Protection Review Group meeting was to discuss the Bmuns Ferry Rcplication Fire Test. The follo. ting are the conclusions and agreements:
1.
The Unden<riter Laboratories proposed a test room that consists of an open-ended enclosure constructed in a larger test building.
This u.3 agreed upon.
2.
The walls of the enclosure will be constructed of cinder block and the ceiling of ceraform board.
3.
The air flow values obtained from TVA (.5 to 25 ft/ min) are low enough that it can be duplicated by natural convection in the test building. Sandia agreed to make sure that there are no air ducts in the ceiling directly above the simulated fire Zone.
4.
The cable trays and conduits will be tenninated at the floor level.
Calculations, made by Dr. Hunter of APL, showed that the heat conduction through the floor would be small.
Ho'.eever, a floor seal will be fabri:ated that will functionally duplicate the seal design in the plant.
5.
The overhead sprinklcr and deluge system will be constructed as in the plant without the long connecting pipes. The delAv time after initiation will be obtained by calculation and not be duplicating the long water line in the plant.
The calculations will be based on the nominal flow out of the sprinklers which will be obtained frca TVA.
6.
The conduit in the plant is, of coarse, open at both ends.
It was agreed that the test, with only the top end opened, is reasonable. Also, it was agreed that the cable will be installed the conduit using a norma'ly-used pulling compound.
S" e details of the vloor dra' n and floor pitch will be obtained 7.
from TVA.
This could affect the test if the water, from the deluge system directly above the trays, fills the floor channel which will also contain the exposure fire fuel.
This would cause th6 (del -to flow onto the floor.
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A section of failure criteria will be added to the test plan.
A failure is censidered to be loss of any cable in more than one safety division.
Based on the Sandia and UL review of the drawings received from TVA, this can occur if there is a short or open circuit failure in any of the following.
a Tray KS-ES-II cnd conduit 3A-ES-50-1, b
Conduits 3A-ES-2501-II and 3A-ES-50-1, or c
Tray TK-ES-II and conduit 3A-ES-50-1..
The mathod used to detect failure will be identical to that used during the last UL cable tray fire test which is a low voltage, low cur, rent circuit.
The circuit current will be monitored to determine short, or open, conditions.
9.
The cable mix in the Sandia test plan was agreed upon.
- 10. Ten uncoated cables will be used in one tray (KS-ES-II).
11.
Further details are needed for the junction box.
Following receipt of this information, a decision will be made as to how much detail must be reproduced.
This delay should not impact the schedule if the information can be obtained within the next month.
12.
The cable coating)will be put on to a specification of 1/4-inch dry (minimum with no opening left between cables (i.e.,
the coated tray will be a solid barrier).
- 13. Smoke and heat detector response time, as well as sprinkler calibration, will be determined by separate effects test. A minimum of three terts for each will be conducted.
If there is a significant spread in the data, more than three tests will be conducted.
These separate effects tests will include the ten uncoated cables.
- 14. Sandia will prepare an instrument list for review by the Fire Protection Review Group. Temperature measurements will be made an the conduit wall and inside the cable tray between the cable and coating.
This ceasurement will be used to determine if the tray can be reused for additional testing, if no failures have occurred during the first test.
- 15. NRR will. pmvide the guidance.for the fire brigade after the brigade. response time has been established.
The question of brigade response time has not been agreed upon.
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FEB C 1931 ATTEfiDEES Leo K1tmerus, Sandia Don Dube, Sandia Leon 'Pryzbla,.UL Bill Christian, UL Ron Feit,fiRC Scott fludson,fiRC f.oren Itunter, APL k
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DISTRIBUTION LIST FOR IIEl10RAllDUM DATED-F]RE PROTECTION:
li. Notley, SD
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G. }iarrison, DSS )
REVIEW GROUP V. Thomas, IE
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F. Rosa, DSS R. Satterfield, DSS D..tischer, DSS W. Rutherford, IE J. Stone, IE F. Shemanski, DDR D. Sullivan, SD T. Donning, DDR S. liudson, NRR A. Ungaro, DSS W tiaass, DPM R. Ferguson, NRR M. Taylor, RES S. lianauer, DSS V. Benaroya, DSS
- 11. Wilber, IE
- 5. Ebneter, IE-1 W. Miller, IE-II
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NRC PDR (2) File #1-23 C. Morris, SD R. Silver, ORB 2 B. Christian, UL L. Klamerus, Sandia L. liurter, APL L. Przybyla, UL-W. VonRiesemann, Sandia C
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