ML20153D886
| ML20153D886 | |
| Person / Time | |
|---|---|
| Site: | Harris, Wolf Creek, Grand Gulf, Arkansas Nuclear, Callaway, Waterford, 05000000 |
| Issue date: | 02/17/1986 |
| From: | Brown R AFFILIATION NOT ASSIGNED, B&B PROGRESSIVE MATERIALS & TECHNOLOGIES, INC. (PROMA |
| To: | Martin R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| REF-PT21-86, REF-PT21-86-067-000 PT21-86-067-000, PT21-86-67, NUDOCS 8602240284 | |
| Download: ML20153D886 (8) | |
Text
I (p
m e( S (b
[
l
- f
.c.
PROGRESSIVE MATERIALS AND TECHNOLOCJES. INC.
Q.100.020 February 17, 1986 U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 Attention: Mr. Robert Martin Administrator, Region IV
Reference:
10 CFR Part 21 - Notificat ion of Defects Gentlemen:
Pursuant to the provisions of 10 CFR Part 21 - Reporting of Defects and Non-compliance, notification is hereby given of the existense of defective con-duit seals at Waterford 3 and other nuclear generating stations as identified herein. Final information leading to this report was obtained on February 13, 1986 at 12:00 p.m. and verbal notification as required by $ 21.21 (2) was given on February 14, 1986 at 8:36 p.m. to Mr. David Powell, U.S. Nuclear Regulatory Commission, Washington, D.C.
~
Information contained in this report is based on fire tests performed on two (2) existing seal configurations and subsequent preliminary evaluations con-ducted by B&B PROMATEC, Incorporated and Louisiana Power & Light Company.
Details are as follows:
(1) PROMATEC conducted a series fire tests on two (2) penetration / conduit seal configurations that are presently installed at various nuclear generating stations in accordance with the requirements of ASTM E119, 814 and IEEE 634. The initial purpose of the tests was to ascertain the effects " pull rope" extending through conduit seals would have on the ability of such seals to perform their intended function. While
" pull rope" was shown not to be a factor in the ability of the seals to perform their intended function during initial tests, both conduit seals failed to perform properly causing the seal configuration them-selves to become suspect.
Additional tests were conducted with the some configurations deleting
" pull ropes" to determine design integrity of the seals.
The config-urations and characteristics tested are as shown on attachments 1
\\
8602240284 860217 ADOCK 0 % g 3 DR g
P.U. BOX 4672
- HOUSTON, TEXA5 77210 * (713) 690-5240
F~
l 4
Tot Administrator, Region IV Q.100.020
-From: Randal W. Brown Page 2 of 5 and 2, and as further described below.
1.0 Test Penetration Characteristics One 8" x 8" blockout and one 8" x 20" blockout in a 12" thick concrete slab with two (2) conduit penetrators as described below and detailed on drawing no. B-519 (attachment 1).
1.1 4" diameter x 27" long steel conduit 1.2 40% actual fill of IEEE 383 rated cables.
Cables were a total length of 62" and extended a minimum 36" above the slab.
1.3 Conduit extended a minimum 1" above the top of the slab and a minimum 12" into the furnace below the slab. Cable fill and mix within each conduit was similar to the ANI/
MAERP requirement of one-third 16 GA/2 cond (Representing.
instrumentation cable), one-third 12 GA/7 cond (Represen-ting control cable), and one-third 300 MCM/1 cond (Repre-senting power cable).
2.0 Penetration and Conduit Seal Characteristics 2.1 Materials used in installation consisted of:
2.1.1 Damming and cable separation - Alumina Silica Fi-berous Material (Bulk and Board).
2.1.2 Penetration and conduit seal - Dow Corning 3-6548 Silicone RTV Foam 2.2 Penetration and conduit seal configurations were as fol-lows:
2.2.1 Configuration 1097b.1 - Conduit seal with a minimum depth of 6" plus 1" damming as measured from the top of the slab; penetration seal with a minimum ' depth of 10" plus 1" damming as measured from the top of the slab.
2.2.2 Configuration 1097b.2 - Conduit seal with a minimum o
depth of 6" plus 1" of damming as measured from the top of the slab; penetration seal with a 6"
depth.
plus 1"
of damming as measured from the top of the slab.
).
3 p.
TO:.Administr!.tcr, Region IV Q.100.020 from: Randal W. Brown Page 3 of. 5 3.0 Test Characteristics 3.1 Thermocouples were located in accordance with the-require-ments of IEEE 634 and ASTM E119 as shown on drawing no.
B-520 (attachment 2).
3.2 The prepared test slab assembly was exposed to the standard time temperature curve established by ASTM E119 ~for a period of three (3) hours with the following results:
3.2.1 Configuration 1097b.2 - Thermocouple F-19 exceeded the maximum allowable with a temperature of 401o F at 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, 23 minutes and a three (3) hour reading of 659a F.
3.2.2 Configuration 1097b.1 - Thermocouple F exceeded the maximum allowable with a temperature of 401o F at 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />, 14 minutes and a three (3) hour reading of 4460 F.
3.3 While no flame through was noted on the unexposed side and hose stream tests did not cause openings, heat transmission as indicated by the field thermocouples exceeded the max-imum temperature requirement of 325o F above ambient.
An autopsy was performed and resulted in the discovery that both conduit seals were reduced-to ash.
3.4 Although the affected seals did not meet the full three (3) hour requirement for heat transmission, both configurations are operable up to the time periods referenced in para-graphs 3.2.1 and 3.2.2, respectively.
(2) The requirement to install conduit seals at the fire barrier was in-
!~
cluded in design specifications for various stations in order to comply with Branch Technical Position 9.5.1-29 (3). Preliminary investigations by Louisiana Power & Light Company and B&B PROMATEC-indicate that the defective configurations are probably of a generic nature affecting an unspecified number of nuclear generating sta-l tions.
I The number and locations of all affected stations cannot be deter-I mined by Louisiana Power & Light Company or B&B PROMATEC.as various
(
utilities and seals contractors may have designed and installed simi-lar configurations. Preliminary investigations by Louisiana Power &
Light and B&B PROMATEC has determined that the following stations and i
l l
l
I
.s
'Tc: Admini;tr;ter, Region IV Q.100.020 From: Randal W. Brown Page 4 of 5 licensees are likely to be affected, as a minimum:
- WATERFORD 3......................... Louisiana Power & Light Co.
- GRAND CULF 1........................ Mississippi Power & Light Co.
- NUCLEAR ONE 1.......................A.rkansas Power & Light Co.
- SHEARON HARRIS 1....................Carolina Power & Light Co.
- WOLF CREEK.......................... Kansas Gas & Electric Co.
- CALLAWAY 1.......................... Union Electric Co.
Various organizations have participated in the design and installa-tion of penetration and conduit seals at the locations identified thus far. Evaluations to determine the nutber and locations of all defective seals is expected to be an extensive, _ time consuming opera-tion that would require the collective efforts of all affected orga-c nizations. Evaluations are currently in progress by B&B PROMATEC and-Louisiana Power & Light for Waterford 3.
(3) Other tests were conducted satisfactorily to provide potential cor-rective actions that may be taken for those seals determined to be unacceptable for the operability time periods previously referenced.
Possible corrective action measure include:
(a) Evaluation of affected conduit seals to determine if exception can be taken to the required three (3) hour rating.
(b) Rework of conduit seals that can not be excepted from a three (3) hour rating by installing:
(1) Installing a 3" depth silicone RTV foam seal boxed off with 1" alumina silica board at the conduit termination point (attachment 3).
This would also require the installation of an additional 6" depth seal at the ' nearest accessible point on the continuous run side of the conduit.
(2) Installing an ndditional 6" -depth conduit seal at the nearest accer,sible point on the continuous run side of the conduit.
Due to the apparent generic nature of this condition, it is requested that assistance and/or direction by the NRC be given in order that we may proceed in the proper manner.
I'RMM A IIt
r_
g 4
- To: Administrator, Region IV
-Q.100.020 Trom: Randal W. Brown Page 5 of 5 Please contact the writer at (713) 690-5240 at you earliest convenience.
- Sincerly yours, PROMAIEC
,1 M h!V
+?
andal W. Brown Quality Assurance Mangaer RWB/dmek attachments: (1) Drawing Number B-519 (2) Drawing Number B-520 (3) Drawing Number B-505 cc:
R. Block R. Pearson R. Werme G. Burt L. Spriggs B. Collier (LP&L) 5 a
1 l'R(*M1 A II:(
C m.. m.
m
.m
...m..
V
\\-
b
.\\
isllh sh I
o I
O,
.H 8
erm AttuRL talkl. Till c,
... - in.
,r--
q ff..
G)l 0 li o i
.._ _ _ _1 FUE. 1094.1 fT 84. 109%.2
+
e m M pas $12msoFans a= eseh stinmme rame
_emssui ammt with tea egen
)
s
>termt etth s epth A
A
,j. _=,_
- r_
- ga 4*
I t
g i
l Q
& 1, l
M dL+ed 2
\\
I Jj'!!
5g p
l
~
9'73!,5:5 es tni!:
l
,i; ll.
i;.:-. """ !!!
- e..,
e.inth/wwe Mwe iiig i
p
' #;Wi i
E i
TEST SLAB LAYOUT
- ^f tip
% f2* Test Sieh 1
2 h d id4 2
M
}s
- ' " " ~ ' " * ' " " " '
l
.e; 3
r_ g -
y-
-.i,m 1
I.
i io g
4* 8 Steel 97 g
Cardelt a 26*
9 "'-
=igen p
l AMMt0VAf.
"fV'S80*8 i
M
+3<
i um saw er SECTI0II A-A I
i*
CTP 10973 CollDUIT TEST
)r TEST LAftWT AIS ETARS l
"" " /
W13/K, 4
Ls J 2w N*n A
~~~
7
.s g2 l gl I
w E i Pi B
a e,
g 8 E. ll l
t l
I 1
=
k 4
9 R
1 1
i l
I m
g i
g
~
i
?
=
I n
w 4
m I'
g w
)
~
=
=
II w
a E
a.
R C
-?
1 i
w
_=,
3 w
ar!
t L
g I
1 i
I OZO*00L'O Zltm pe11y
t l
a e
I 110E ACTUAL CABLE FILL life RATED SITE SPECIFIC CARLE 36" Tw i I-34 or CAeLES E-36 c^
'y
1
)
\\
t BOXIf06 0F DMet!NG BOARD g,
I'.
l
}
AND SHEET METAL
,g, 5
II DEPTH l,'
fflflI 548 stLICowE FOAM t_ l g
,o, x
k MP Putt jij '
Rm x
s
-,T,,
3-6548 siL CONE o
10" aEPTH
- 5 :
etTV FO M
!!. i:l !
ew 3-6548 slLICONE l
8 O
RTY FOMt 1
I f
l d
I
- T!!h l
g 3
l-i naa. oAmiNG f
w w
v l
L I
I 4* f X 27* STEEL CONDUIT 92=
=.
g.
'd.--
3 1097A.5 a
4* f PIPE CAP REPAIR C
W PUR RW'E 6* DEPTH 3-6548 SILICONE MN RTV FOAM W/DM911f06 g
E0XED FOR 3* ADDITIONAL RtYntoes 3
(10"3N5ksSYCONomi d
i eC EXTERNAL) e can t{.
m a
I e
S R D(TAIL CTP 199FA CONDUIT 1EST CTP 1097Aj[
M" Tall 1 T E N --
3
- e. (gg ame,y,
'Q8 M
l o
o 1 - vh -