ML20106J595
| ML20106J595 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 10/29/1984 |
| From: | DUKE POWER CO. |
| To: | |
| Shared Package | |
| ML20106J577 | List: |
| References | |
| NUDOCS 8411010269 | |
| Download: ML20106J595 (4) | |
Text
- -,
i Proposed Amendment to Catawba Unit 1
- Technical Specification 3/4.8.1.1 Concerning the Cathodic Protection System h h A h k O b k$3 i
P PDR L..
- .-_, Page 1 b[
f'3 ELECTRICAL power SYSTEMS
+
.l',
g-
- i LIMITING CONDITION FOR OPERATION 4g!z ACTION (Continued)
E 2.
Uy When in MODE 1, 2, or 3 with a steam pressure greater than 900 b
,V$$%.
psig, the steam-driven auxiliary feedwater pump is OPERA 8LE.
,a 0
.Y 1 If these conditions are not satisfied within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> be in at least M
v HOT STANOBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the I f :$ o following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
hG
<o
.5 Y
_d.
With two of the. above required offsite.A.C. circuits inoperable,
- g- (j "g demonstrate the OPERASILITY of two diesel generators by performing 4
Specfication 4.8.1.1.2a.4) within 1 houis and at least once per
-f..$
8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafteri unless the diesel generators are already operating; w7 d
restore at least ' ne of the inoperable offsite sources to OPERA 8LE o
di a>.
status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or be in at least HOT STANOBY within the next Ed N 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. Vf ch only one offsite source restored, restore at least I
c~*d two offsite circuits to OPERA 8LE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> from time of
.i
.$'yq initial loss or be in at least HOT STAN08Y within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> J.
and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
N4 With two of the above required diesel generators inoperable, demonstrate e.
ff the OPERA 8ILITY of two offsite A.C. circuits by performing Specifica, T W
j
.h tion 4.8.1.1.la. withth I hour and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> there-
~1 %
4lST,Q
( )
k after; restore at least one of the inoperable diesel generators to OPERABLE status within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> or be in at least HOT STAN08Y within-J the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
p 3 _.g Restore at least two diesel generators to OPERA 8LE status within 4
-4.3 3
L.
72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> from time of initial loss or be in at least HOT STAND 8Y within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the followin'g 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
$d 5
}SURVEILLANCEREQUIREMENTS t$
4.8.1.1.1 Each of the above required independent circuits between the offsite transmission network and the Onsite Essential Auxiliary Power System shall be:
Determined OPERA 8LE at least once per 7 days by verifying correct a.
breaker alignments, indicated power availability, and b.
Demonstrated OPERA 8LE at least once per 18 months during shutdown by transferring (manually and automatically) unit power supply from the normal circuit to the alternate circuit.
4.8.1.1.2 Each diesel generator shall be, demonstrated OPERA 8LE:
a.
In accordance with the frequency specified in Table 4.8-1 on a STAGGERED TEST BASIS by:
1)
Verifying the fuel level in the day tank, CATAWBA - UNIT 1 3/4 8-2
., Page 2 i -
4 -
ELECTRICAL POWER SYSTEMS-SURVEILLANCE REOUIREMENTS (Continued) 2)
Verifying the fuel level in the fuel storage tank, 3)
Verifying the fuel transfer valve can be operated to allow fuel to be transferred from the storage system to the day tank, 4)
Verifying.the diesel starts from ambient condition and accelerates to at least 441 rpm in less than or equal to 11 seconds.
The generator voltage and frequency shall be 4160 + 420 volts and 60 + 1.2 Hz within 11 seconds after the start signal.
- The diesel generator shall be started for this test by using one of the following signals:
a)
Manual,.or b)
Simulated loss of offsite power by itself, or c)
Simulated loss of offsite power in conjunction with an ESF Actuation test signal, or d)
An ESF Actuation test signal by itself.
5)
Verifying the generator is synchronizFd, loaded to greater than
(!
or equal to 7000 kW in less than'or equal to 60 seconds, and operates for at least 60 minutes, and 6)
Verifying the diesel generator is aligned to provide standby power to the associated emergency busses.
b.
At least once per 31 days and after each operation of the diesel where the period of operation was greater than or equal to I hour by checking for and removing accumulated water from the day tank; At least once per 31 days by checking for and removing accumulated c.
water from the fuel oil storage. tanks; d.
By verifying that the Cathodic Protection System is OPERABLE y
verifying:
l')
At least once per 60 days that cathodic protection rectifiers are OPERABLE and have been inspected in accordance with the manufacturer's inspection procedures, and 2)
At least once per 12 months that adequate protection from corrosion is provided in accordance with manufacturer's inspection procedures.
By sampling new fuel oil in accardance with ASTM-04057 prior to e.
addition to storage tanks and:
C CATAWBA - UNIT 1 3/4 8-1
+ T k (wk.he hcobekm fy w need no4-k ope.M&c ud/ ahee /be N
fres t re bl% cudve..
., Page 3 JUSTIFICATION AND ANALYS13 0F SIGNIFICANT HAZARDS CONSIDERATION The proposed amendment would allow the Cathodic Protection System to be inoperable until after the first refueling outage. An ACTION statement would be added to specifically address the actions to be taken if the cathodic protection system should ever be declared inoperable.
A detailed review and check of the cathodic protection system at Catawba indicates that the existing system will not completely protect the diesel fuel oil system without causing accelerated corrosion on other piping in close proximity to the diesel fuel oil system. The solution to the problem is to supplement the existing cathodic protection system with an additional small system dedicated only to the diesel fuel oil system.
Current Technical Specifications require cathodic protection of the diesel fuel oil system. The purpose of cathodic protection is to pro-tect structures from the long term effects of corrosion. At Catawba, corrosion of piping systems without cathodic protection is not considered a problem due to the high average soil resistivity at the location. Thus, defertant of the application of cathodic protection to the diesel fuel oil system for the time period required to design and install the dedi-cated cathodic protection system is not considered significant from a corrosion point of view. We would expect that the system could be installed and operational by the first refueling outage of Unit 1.
Hence, a deferment of current technical specification requirements for cathodic protection of the diesel fuel oil system is necessary.
In addition, the current wording of the surveillance requirements for the cathodic protection system for the diesel fuel oil system should be revised as marked. Due to +ta nature of a cathodic protection system in general, and particularly due to the inherent low natural corrosion potential at Catawba, the inoperability of the cathodic protection system at Catawba for a 6 to 12 month period is not considered to be a signifi-cant problem. The modification of the ACTION statement wording as marked also is considered necessary to permit normal maintenance and replacement of system components over the life of the plant.
10 CFR 50.92 states that a proposed amendment involves no significant hazards considerations if operation in accordance with the proposed amendment would not:
(1)
Involve a significant increase in the probability or consequences of an accident previously evaluated; or (2) Create the possibility of a new or different kind of accident from any accident previously evaluated; or (3) Involve a significant reduction in a margin of safety.
e h.
The~ proposed amendment does not -increase the probability or consequences of an accident previously evaluated and it does not create the possibility ~
of a new or different kind of accident.
The proposed amendment does not 4.volve a significant reduction in a margin of safety for the reasons cited above.' Therefore, Duke Power Company concludes. that the proposed amendment does not involve signi-
= ficant hazards considerations.
I e
4 1
4 i
w r-
, e r ~ w,- w a rm,w--sw w
e,a--w--r,w,vy,-,-
e r
e--
wnr.,w+w,m-,r,,,
w--------
m+wa
~