ML19341D043
| ML19341D043 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 02/25/1981 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NCR-SQN-EEB-800, NCR-SQN-EEB-801, SQNEEB8009, SQNEEB8010, SQNEEB8011, SQNEEB8012, SQNEEB8013, SQNEEB8014, SQNEEB8015, SQNEEB8019, NUDOCS 8103040757 | |
| Download: ML19341D043 (6) | |
Text
_.
'Iy.hZ35EE
..L r A ; u ~; c ' ~
- s
_31 400 Chestnut Street Tower II February 25, 1981 Mr. James P.
'Reilly, Director Office of Ins tien and Enforcement U.S. Nuclear Re latory Conunission Region II - Suit 3100 101 Marietta Stre Atlanta, Georgia 303 s
Dear !!r. O'Reilly:
SEQUOYAH NUCLEAR PLANT UNIT 2 - ENVIRONMENTAL QUALIFICATION CF CLASS IE EQUIPMENT - NCR'S SQN EB 8009 THROUGH 8015 AND 8019 - FIFT'1 INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector C. R. McFarland on June 16, 1980, in accordance with 10 CFR 50.55(e).
Interim reports were submitted on July 16, August 11, September 19, and November 21, 1980. Enclosed is our fifth interim report. We expect to submit our next ' eport by April 2,1981.
r If you have any questions, please get. in touch with D. L. Lambert at FTS 857-2581.
Very truly yours, TENNESSEE VALLEY AUTHORITY L. M. Mills, Manager Nuclear Regulatien and Safety Enclosure cc:
Mr. Victor Stello, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, h LU /
g 555
?
ff & 4;h S
- rW 9._,
t a
N kW I
h yx t-E g,/ w ii >'q @ '
8108040757 5
\\
l ENCLOSURE SEQUCYAH NUCLEAR PLANT UNIT 2 ENVIRONMENTAL QUALIFICATION OF CLASS 1E EQUIPMENT NCR'S SQNEEB8009 THROUGH 8015 AND 8019 10CFR50.55(e) REPORT FIFTH INTERIM REPORT Description of Deficiency The following NCR's pertain to Class 1E components for which documentation bas.not been located to establish their ability to operate in the ambient conditions (temperature, humidity, radiation, and/or pressure) fer which they are required.
SONEEB8009 - Pressure Switches PS-30-46 Ass, -47 AaB, and 38 t&B -
T. 'se pressure switches are required to operate during a g
L0gA at temperatures of 135 F and radiation doses of 5 x
.10 rads.
SQNEEB8010 - Class 1E Motors - These motors are required to operate in various normal and postaccident environments. See A.
SQNEEB8011 - Solenoid Valve FSV-70 This solenoid valve cust operate at a temperature of 202 F, a radiation dose of 3.6 x 10' rads, and a relacive humidity of 100 percent.
SQNEEB8012 - Solenoid Valves PSV-65-81 and PSV-65 These solenoig valves are required to operate in an environment of 150 F 7
and 7 x 10 rads.
SQNEEB8013 - I/P Transducers PDM-65-80 and PDM-65 These transdycers must operate in a postaccident environment of 7 X 10 rads.
SQNEEB8014 - Portions of the Hydrogen Monitoring System counted in the Annulus ~- These pogtions are reyuired to operate in an environment of 150 F and 7 x 10 rads.
SQNEEB8015 - 1. DC Vent Fan Motor and Starter - This motor and sgarter are required t perate in an envir nment f 104 F and 3
less than 10 rads.
2.AuxiliaryAirCompressorMotorandInstrumengRackis required to operate in an environment of 115 F, a relative humidigy of 100 percent, and radiation dose of less than 10 rads.
/
~,
yv
O
- 3. Pressurizer Heater Transformers are required to a
operate in a postaccident environment of 115 F, a relative humidi'y of 100 percent, and radiation dose 3
of less than 10 rada.
- 4. Pressurizer Heater Distribution Cabinet CVRL is required to operate in an envijonment of 115 F. a radiation dose of less than 10 rads, and a rr Ative humidity of 100 percent.
- 5. Turbine-Driven Auxiliary Feeovater Temperature Instrument Panel ig required t0 operate in an environment of 125 F, a relative humidity o 100 percent and a radiation dose of it.Ss than 10{ rada.
- 6. A/C Circulation Pump Motors E1.734 ar; requirgd to operate in an postaccident environment of 115 F, a radiatien dose of less than 10 rads, and a relative humidity of 100 percent.
- 7. Solenoid Valve FSV-81-12 is required to operate in an environment of 110 F, a relative humidity of 100 percent, and a radiation dose of 10 rads.
- 8. Rotark MOV Model 7A/1RP is requgred to operate in a postaccident environ =ent of 115 F, a relative humidigy of 100 percent, and a radiation dose of less than 10 rads.
- 9. 6900V RCP PT and Relay Boards 1 gnd 2 are required to operate in an environment of 115 F, a relative humidityof100 percent,andaradiationdoseofless than 10 rads.
SCNEEB8019 - Class 1E electrical cables with either high or low density polyethylene insulation, which are located in areas subjected to high energy line breaks outside primary containment (nodes 2, 5,10, and 17), are not qualified to the accident environment profiles defined for these areas.
Safety Imolications These components perform critical safety functions that are necessary for the safe oparation of the plant. Failure of one er more of these co=penents du-
~ a L^ 4 condition could adversely affect the safety of the plant.
9e required environmental documentation, it is not known under
, ions cne or more of these systems might fail.
Corrective Action (Final ReS
- on the Following Items)
/
SCNE228009 - The unqualified pressure switches on this NCR have been replaced with environmentally qualified switches.
i
i SQNEEB8010 - Class 1E motors en contracts 72c38-92802, 72c38-83527, 76K35-83673-14 3d 71c30-92695 have been qualified for a period of 5 years; ;;atract 73c38-83532 for 2.5 years; and 71c30-92646 for 40 years. Replacement motors will be purchased and installed before the end of these time spans. Motors on contract 72c33-92730 have been determined not to be Class 1E equipment.
SQNEEB8011 - TVA has reevaluatd the function of the solenoid valve and i
has determined that it is not safety related.
SQNEEB8012 - The solenoid valves have been replaced with qualified valves for units 1 and 2.
SQNEEB8014 - The hydrogen monitors have been tested at a level which is less than ene6 order of magnitude below the accident dose of 5.6 x 10. At the tested level, there were no fai3 ares. It is TVA's engineering judgement that the acetdent dose would not affect the operation of the hytrogen monitors; however, they will be tested 7 by b*yle Labs to a higher radiation level (1 x 10 ) than the accident dose level. This informaticn justifies continued use of the monitors.
SQNEEB8019 - TVA has determined that the icw current loads on the cables will allow them to function in the adverse environment without experiencing cable insulation da= age.
The cables will, therefore, not require replace =ent.
Interim Progress SQNEEB8013 - The required temperature and pressure for the environment in which the I/P transducers are located are well within the manufacturer's specificaticns. This justifies continued use of the devices; however, TVA will either type-test these devices or replace with type-tested ones.
SQNEEB8015 - 1. The de vent fan motor and starter will be qualified by analysis or type test.
- 2. The auxiliary air compressor motor has been qualified for a period of 2.5 years. A replacement will be purchased and installed before the end of this time span. The instrument rack has limited interis qualification. Because of the lack of proper documentation, certain relays in the instrument rack will be replaced with qualified ones before unit 2 fuel loading.
- 3. This equipment has been qualified b" similarity to qualified components from the same vendor.
I e
n
'I J
- 4. This equipment has been qualified by similarity to qualified components from the same vendor.
- 5. TVA is still awaiting documentation from the vendor to qualify this equipment.
6.
The A/C circulation pump motors have been qualified for a period of 2.5 years.
7.
TVA has not yet received documentation to qualify this solenoid valve.
3 8.
This component has been determined to be a "Limitorque" operator, for which adequate qualification documentation exists; therefore, it is qualified for the plant environment.
9 TVA is still awaiting documentation from the vendor to qualify this equipment.
4 4
1 o
{
i f
h i
t l
/
l
~
l t
. -. -.. +. -...
.er e*
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 i sC 9 9 9 9 9 9 9 9 3 9 9 9 9 7
9 9 9 9 ui qR e/
R tn
.e ci*
ebC 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5 5 SA s
4 4 6 6 pm 4 4 4 4 4 4 4 4 4 4 4 4 4 4 t
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 n
8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 e
8 8 m!
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 9 9 n1 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 o//
rp i m 3 3 3 3 3 3 3 3 3 3 1 3 8 8 3
3 1
1 v e 'C nT 3 3 3 3 3 3 3 3 3 3 3 3 6 6 6 3 9 8 E
4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 es ro aD e
s 0 0 Yl daa 6 6 6
6 6 6 6 6 6 g a6 1
1 0 mR C 0 0 0 0 0 0 0 0 0 0 0 0 e e 0 4 r J
1 1
1 1
1 1
1 1
1 1
1 1
N N 1
x x 0
o 1
2 2 I
I 0
8 B
E t
SE n
R e r' ON d a TQ i e 6 6 6
6 A
!OS cY 0 0 0 0
0 c
s g d 1 1
1 g g g 1 g g g g g g 1 1
T A1 d e e e e e e e e e e e ER a
N N x x x N N N x N N N N N N x -
T I O
.eR 6 6 8
8 N
P gs 5
E SE eo t
SR t D 7 5 6 7
7 M
A n
n LE I
t A
CC s
T N
p A
m T
l 1
l U
u A
A O l
P Y!
l O0 A
U 1'
r Q1 r U n
s e EO e
ll s a p
t SC U U l
A U r F U m s N
l o
!A l
e l
u o O
ll l
l A A o
p A P o U
N C m U o t
n B
l l
t p
U u
p l
o a a m r A
l N
t n m I
p P m A C e F o e r I
O n
e u A m u
r o
t e s t U m P u d P p m T R
a t
p n i e,
l t
r r P i m o t
W a m e A U u o s a d U u m e
a t
e e c U P R a e r g P
t m
p e i l
l g A F l
G r a n g r s m
r P o o n A A o
T o o i c y n T o i n y a i B
l i a p n C
l C C r i &
e a o s e a r s r i g s o
l r m a a u p p h o p a p t d a
t o o p o h C F a
m C B m h S a
l G
l C
o S C c t
C.
u u u C r B o
e t P P
. & P t
V
. r M r n t
e t
e
. r -
p p t
e e e R S n W S p n n x e 0 m m n w D m
p i I
e F C i o e u m 8 o o o o R l
E S H S C A C P c P A E 4 C C C L C 1
2 2 2 2
2 2 2 2
2 2 7
7 3 5 2 6 0 0 0 0 0 0 0 0 0 0 0 0 2
2 7
9 3 4 3
3 t
8 8 8 8 8 8 8 8 8 8 5 5 6 6 5 6 7
7 c
2 2 2 2
2 2
2 2
2 2
3 3 3 2 3 2 2 2 a
9 9 9 9 9 9 9 9 9 9 8 8 8 9 8 9 9 9 r
t 8 8 3 8 8 8 8 8 8 8 8 8 5 0 8 0 3 3 n
3 3 3 3
3 3 3 3 3 3
3 3 3 3
3 3 3 3 o
C C C C C C C C C C C C K C C C C C C
2 2 2 2 2 2 2 2 2 2
2 2 6 1
3 1
2 2
7 7 7 7 7 7 7 7 7 7 7 7 7 7
~7 7 7 7 e