ML20046B180
| ML20046B180 | |
| Person / Time | |
|---|---|
| Site: | Hatch, Farley, FitzPatrick  |
| Issue date: | 07/13/1993 |
| From: | Maxwell J AFFILIATION NOT ASSIGNED |
| To: | Mccracken C Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20046B176 | List: |
| References | |
| NUDOCS 9308030239 | |
| Download: ML20046B180 (4) | |
Text
i l
l ThermalCeramics P. O. Bod 923 Tel 706-796-4200 7
3 Augusta,[GA 30903 Fax 706-796-4398 J
July 13, 1993 9
i Conrad E. McCracken, Chief Plant Systems Branch Division of Systems Safety and Analysis United States Nuclear Regulatory Commission Washington, D.C.
20555
Dear Mr. McCracken:
The following is in response to your letter dated April 27, 1993.
I.
A.
FP60 is the only system which has been supplied over the last seven (7) years to NRC reactor licensees.
L II.
A.
Plants where FP60 system was installed:
N.Y.
Power Authority - Fitzpatrick Power Station Georgia Power
-- Plant Hatch Alabama Power
- Farley Nuclear Plant (Kaowool)
(Note - in previous correspondence it was stated that Farley Plant used FP60.-
This _. was an error; they used Kaowool)
B.
FireMaster FP60 FireMaster Bulk Kao-Tex FireMaster 1000 or 1800 (optional)
FireMaster Board 1" Filament Tape 3/4" Carbon Steel Banding 3
--8 lbs./ yard Open Wire Mesh Carbon Steel Bar Stock' Threaded Rod 1/4" Nuts and Washers 1/4" Wall Anchors Wire Ties Hose Clamps Carbon S_ teel Angle Iron For more detailed information see Section 3
of Installation Procedures.
930B030239.930715
.PDR ADDCK 05000321 P
PDR M m.rp.
ThermalCoramics -
h i
f Mr. Conrad E. McCracken i
July 13, 1993 1
7 Page 2 C.
The system was tested by UL and given the classification of 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />.
The testing was also accepted by American Nuclear Insurers (certificate enclosed).
i D.
The material is inorganic and achieves the fire rating from its insulation properties.
There is added performance from the aluminum foil which acts as a radiation blocker. This affect is small but significant.
III.
A.
The full scale test was carried out at UL with the failure criteria was based on circuit integrity.
The heating curve was to ASTM E119 and the assembly was exposed to the standard hose stream after fire test.
Another small scale test was carried out at SWRI on specific configurations.
Both tests are enclosed.
As stated, circuit integrity and hose stream were taken as the requirement.
However, it was left up to the utility to gain a case.by case acceptance of the system for their specific use.
B.
Test reports have already been supplied.
Another copy has been enclosed.
t t
C.
The materials in the barriers are non-combustible and have 0, 0,
O ratings.
IV.
A.
The derating factors as tested were calculated to be 39%
for conduit and 61% for cable tray.
B.
The test reports were supplied to utilities who then gained a case by case acceptance.
t C.
Test reports are included.
l V.
?
A..
All testing is on the product and not the system. 'Also, testing is not carried out on the FP60 blanket'in its final form, only the ceramic fiber is tested. The reason.
l for this is that the fiber is the-weak link with regard
[
to physical properties.
Tests carried out
- Density
.8 pcf
- LOI < 1%
Tensile strength -
SPC chart attached a
5
I Mr. Conrad E.
McCracken July 13, 1993
{
Page 3 i
VI.
A.
Support protection is required and is detailed in Section f
14 of the installation information.
B.
The FP60 system should be used in accordance with the UL classification which lists a
number of criteria (attached) or in accordance with ANI acceptance of testing (attached).
t C.
No.
i D.
The 1/2" blanket is a blown alumina silica ceramic fiber which is tested for thickness and density.
The blanket then has 2 mil alumina foil laminated to both sides using
[
an inorganic cement.
The blanket is left to air dry then rolled up and boxed.
A number of manufacturing checks take place in accordance with the UL follow-up procedure that covers FP60 blanket.
E.
No.
F.
Installation guide for cable tray and conduit i
(attached).
G._
No changes.
H.
FP60 systems were installed by a number of contractors
[
and utility maintenance personnel using the installation "guidel'ines to ensure the correct installation.
VII.
A.
The stated accepted by NRC is not relevant to FP60.
It is"on' the ' systems that 'use FireMaster (Kaowool) blanket.
This is old information and not relevant to the nuclear market but still has a bearing in the commercial market.
The acceptance comes from your Docket No. 50-358 which is attachb'".
d
^
B.
FP60 and Kaowool are similar products.
The chemical composition of the filler blanket used in FP60 and that of Kaowool is exactly the same.
The only difference'is that FP60 has 2 mil aluminum foil laminated to both sides using an inorganic cement.
Installation procedures are l
as stated in installation guidelines for FP60.
.The Kaowool product is installed in exactly the same manner with 3" perimeter overlap and staggered longitudinal butt joints.
i Y
t 1
Mr. Conrad E. McCracken July 13, 1993 Page 4 Should you have any further questions please do not hesitate to contact me.
Sincerely, e
i-(L M John A. D. Ma, Product Marketing JADM:srs 079302
+
Enclosures:
UL Report Project 84NK 8356 with update SWRI Report Project 01-8305-053 SWRI Report Project 01-8818-210 (Derating)
NRC Docket 50-358 Kaowool Acceptance ANI Acceptance of Testing SPC Tensile Strength Chart FP60 Blanket cc:
T. R. Viverito V.
C.
Floyd J.
E.
Fernstrom
~
t 4
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