ML20070J756
| ML20070J756 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 07/20/1994 |
| From: | SOUTH CAROLINA ELECTRIC & GAS CO. |
| To: | |
| Shared Package | |
| ML20070J746 | List: |
| References | |
| NUDOCS 9407250301 | |
| Download: ML20070J756 (9) | |
Text
'
ELECTRfCAL POWER SYSTEMS
' SURVEILLANCE RE0VIREMENTS (Continued) l 4.8.1.1.2 Each EDG shall be demonstrated OPERABLE:
In accordance with the frequency specified in Table 4.8-1 on a a.
STAGGERED TEST BASIS by:
1.
Verifying the fuel level in the day tank and fuel storage tank.
2.
Verifying the fuel transfer pump can be started and transfers fuel from the storage system to the day tank.
3.
Verifying the diesel generator can starta and accalarate to synchronous speed (504 rps) with generator voltage and frequency at 7200 1 720 volts and 60 1 1.2 Hz.
4.
Verifying the generator is synchronized, gradually loaded" to an indicated 4150-4250 kWa* and operates for at least 60 minutes, 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 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> by 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; g,,
g,, g,,
d.
By sampling new fuel oil in accordance with=AGTN=6406A prior to addition to storage tanks and:
1)
By verifying in accordance with the tests specified in
& Aggf,uog A$7N = ASTM =0Mb84 prior to addition to the storage tanks tnat the w,,, d sample has:
An API Gravity of within 0.3 degrees at 60*F, or a a.
specific gravity of within 0.0016 at 60/60*F, when compared to the supplier's certificate, or an absolute specific gravity at 60/60'F of greater than or equal to 0.83 but less than or equal to 0.89, or an API gravity of greater than or equal to 27 degrees but less than or equal to 39 degrees; b.
A kinematic viscosity at 40*C of greater than or equal to 1.9 centistokes, but less than or equal to 4.1 centistokes (alternatively, Saybolt viscosity, SUS at 100'F of greater than or equal to 32.6, but not less than or equal to 40.1), if gravity was not determined by comparison with the supplier's certification;
- This test shall be conducted in accordance with the manufacturer's recommenda-tions regarding engine prelube and warmup procedures, and as applicable regard-ing loading recommendations.
- This band is meant as guidance to avoid routine overloading of +.he engine.
LcNs in excess of this band shall not invalidate the test.
SUW4ER - UNIT 1 3/4 8-3 AMENDMENT NO. }, 93 321 9407250301 94o720 PDR ADOCK 05000395 p
ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 4.8.1.1.2 Each EDG shall be demonstrated OPERABLE:
a.
In accordance with the frequency specified in Table 4.8-1 on a STAGGERED TEST BASISby:
1.
Verifying the fuel level in the day tank and fuel storage tank.
2.
Verifying the fuel transfer pump can be started and transfers fuel from the storage system to the day tank.
3.
Verifying the diesel generator can start
- and accelerate to synchronous speed (504 rpm) with generator voltage and frequency at 7200 i 720 volts and 60 i 1.2 Ez.
Verifying the generator is sE*nchronized, gradually loaded
- to 4.
an indicated 4150-4250 kW and operates for at least 60 minutes.
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 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> by removing accumulated water from the day tank.
c.
At least once per 31 days by checking for and re:noving accumulated water from the fuel oil storage tanks; d.
By sampling new fuel oilin acconiance with the applicable ASTM standard prior to addition to storage tanks and:
1.
By verifying in accordance with the tests specifled in the applicable ASTM standard prior to addition to the storage tanks that the sample has:
a.
An API Gravity of within 0.3 degrees at 60*F or a specific gravity of within 0.0016 at 60/60*F, when compared to the supplier's certificate, or an absolute specific gravity at 60/60*F of greater than or equal to 0.83 but less than or equal to 0.89, or an API gravity of greater than or equal to 27 degrees but less than or equal to 39 degrces; b.
A kinematic viscosity of 40*C of greater than or equal to 1.9 centistokes, but less than or equal to 4.1 centistokes (alternatively, Saybolt viscosity, SUS at 100 F of greater than or equal to 32.6, but not less than or equal, to 40.1), if gravity was not determined by comparison with the supplier's certification; This test shall be conducted in accordance with the manufacturer's recommendations regardin engine prelube and warmup procedures, and as applicable regarding loa mg recommendations.
- This band is meant as guidance to avoid routine overloading of the engine.
Loads in excess of this band shall not invalidate the test.
SUMMER - UNIT 1 3/48-3 Amendment No. WB;-
9%
1 I
I p
ELECTRICAL POWER SYSTEMS i
l SURVEILLANCE REQUIREMENTS (Continued) i l
A flash point equal to or greater than 125'F; and c.
d.
A' clear and bright appearance with proper color when
. tested in accordance with -ASTM 04176-62. m # 'aour A p r * "*aa o.
2)
By verifying within 30 days of obtaining the sample that the JArm44o A.ysnether preper:4e: :p;cified in Teble 1 er ASTM 0375 01-are met when tested in accordance with AS"4 0075-81.m.ept thet in.
elyrie iur suiiu.
ej t p:rf: J d in e a rd m e with -
AS"-01552-75 or h5ii+-Dio22-62. v[ GAM 4uaus S'% S P"DM 0 At least once every 31 days by obtaining a sample of fuel oil in e.
accordance with ASE 02276 and-verifying that total particulate contamination is less than 1
/ liter when checked in accordance l
with AC
-9 " 75-00, n Ged A.
Aea r... o ur A rf s w o
.t o,
f.
At least once per 184 days by:
1.
Starting and accelerating the EDG to synchronous speed (504 rps) with generator voltage and frequency at 7200 1 720 volts and 6011.2 Hz within 10 seconds after the start signal.
The EDG shall be started for this test by using one of the following signals:
a)
Simulated loss of offsite power by itself, b)
Simulated loss of offsite power in conjunction with an ESF actuation test signal.
c)
An ESF actuation test signal by itself.
d)
Simulated degraded offsite power by itself.
e)
Manual.
2.
The generator shall be manually syrchronized, Icaded to an indicated 4150-4250 kW** in less tnan or equal to 60 seconds, and operate for at least 60 minutes.
g.
At least once every 18 months by:
l 1.
Subjecting the diesel to an inspection in accordance with procedures prepared in conjunction with its manufacturer's recommendations for this class of standby service, l
2.
Verifying that on reject. ion of a load of greater than or equal to 729, the voitter and frequency are maintained at 7200 720 volts and frequen y at 60 i L7 Hz.
3.
Verifying the generator capability to reject a load of 4250 kw without tripping. The generator voltage shall not exceed 7920 volts during and following the load rejection.
i
- This band is meant as guidance to avoid routine overloading of the engine.
4 Loads in excess of this band shall not invalidate the test.
i i
SUMMER UNIT 1 3/4 8-4 AMEN 0 MENT NO. // 3 e
i ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) c.
A flash point equal to or greater than 125*F; and d.
A clear and bright appearance with proper color when tested in accordance with the applicable ASTM standard.
l 2.
By verifying within 30 days of obtaining the sample that the specified properties are met when tested in accordance with the applicable ASTM standard.
At least once every 31 days by obtaining a sample of fuel oil in c.
accordance with the apphcable ASTM standard, and verifying that total l
contamination is less than 10 mg/ liter when checked in accordance with the applicable ASTM standard.
l f.
Atleast once per 184 days by:
1.
Starting and accelerating the EDG to synchronous speed (504 rpm) with generator voltage and frequency at 7200 i 720 volts and 60 i 1.2 Hz within 10 seconds after the start signal. The EDG shall be started for this test by using one of the following signals:
a)
Simulated loss of offsite power by itself.
b)
Simulated loss of offsite power in conjunction with an ESF actuation test signal.
c)
An ESF actuation test signal by itself.
d)
Simulated degraded ofisite power by itself.
e)
Manual.
2.
The generator shall be manually synchronized, loaded to an indicated 4150-4250 kW** in less than or equal to 60 seconds, i
and operate for atleast 60 minutes.
g.
Atleast once every 18 months by:
1.
Subjecting the diesel to an inspection in accordance with procedures prepared in conjunction with its manufacturer's recommendations for this class of standby service, 2.
Verifying that on rejection of a load of greater than or equal to 729, the voltage and frequency are maintained at 7200 i 720 volts and frequency at 60 i 1.2 Hz.
3.
Verifying the generator capability to reject a load of 4250 kW without tripping. The nenerator voltage shall not exceed 7920 volts during cud following the loai rejection.
- This band is meant as guidance to avoid routine overloading of the engine.
Loads in excess of this band r hall not invalidate the test.
SUMMER - UNIT 1 3/4 8-4 AmendmentNo Mr%,
Attachrnent II TSP 940003 Page 1 of 2 SAFETY EVALUATION FOR ADMINISTRATIVE CHANGES IN THE VIRGIL C. SUMMER NUCLEAR STATION TECHNICAL SPECIFICATIONS Description of Amendment Request South Carolina Electric & Gas Company (SCE&G) proposes to modify the Virgil C.
Summer Nuclear Station (VCSNS) Technical Specit! cations (TS) to permit alternative, equiva ent testing methods to be performed on the diesel fuel purchased for the Emergency Diesel Generators (EDG). These alternative methods are necessary due to recent changes to Environmental Protection Agency (EPA) regulations that are designed to limit the use of high sulfur fuels. Due to the new requirement that high sulfur vehicle fuels (>0.05 weight-percent sulfur) have a blue dye added for identification, the VCSNS TS are affected. The verification of fuel color and clarity (TS 3/4.8.1.1.2) which checks for water content and particulates, must be met by other testing. An alternative test, ASTM D1796 or D2709, utilizes a centrifuge to separate out the water and particulate matter. SCE&G desires the option of having both ASTM D1796 and D2709 available as alternate methods.
The limit on sulfur content requires very accurate testing. The recommended testing method requires very expensive, high precision equipment. An alternative method utilizes equipment that has the same accuracy and repeatability, but is less expensive and is currently being used by SCE&G.This ASTM method (ASTM D4294), has been determined to be equivalent by the EPA. SCE&G formally requests permission to add D4294 as an approved test method for determining sulfur content.
Due to the evolution of ASTM Standards, SCE&G is proposing that the modified VCSNS TS state that the required testing will be performed in accordance with the applicable ASTM Standard. This will permit the inclusion of future equivalent ASTM Standards to be incor 3 orated into our testing program via 10 CFR 50.59 changes.
The above referencec standards have been determined to be ecluivalent to the currently approved ASTM Standards. SCE&G requests the flexibility to adopt other applicable ASTM Standards that are determined to be equivalent and acceptable under 10 CFR 50.59.
SCE&G also proposes to modify the VCSNS TS by changing the revision level of WCAP-10216-P-A, " Relaxation of Constant Axial Offset Control-FQ Surveillance Technical Specification," referenced in TS 6.9.1.11. This pertains to the FQ(z) TS (TS 3.2.1 and 3.2.2) and is necessary since Westinghouse revised their methodology in determining FQ(z). This revised WCAP has been reviewed and approved by the NRC, TS 3.2.1 and 3.2.2 are not affected by this change. perating Limits for future cyc and will be used by VCSNS to determine the Core O
l Attachment il TSP 940003 Page 2 of 2 Safety Evaluation The new requirement by the EPA to have accurate and repeatable analysis of fuel oils for sulfur content, impacts the methods of on site testing activities performed by VCSNS employees to insure that only quality diesel fuel is accepted. A TS visual test to check color and clarity per ASTM D4186-82 can no longer be performed. This is due to the addition of blue dye to all fuels that contain >0.05 wt/ percent sulfur.
ASTM D4186 is to detect the presence of water and particulate matter, and the dye may interfere with the test. An alternative test can provide equivalent or better results by subjecting the sample to a centrifuge and evaluating the amounts of contaminants per ASTM D1796 or D2709. These methods were reviewed by the Diesel fuel Oil Group and determined to be equivalent.
The new requirement by the EPA on the limit of su: fur by weight-percent allowed, necessitates analysis of the fuel to determine and document the sulfur levels. In order to satisfy the stringent accuracy requirements, a specific test (ASTM D2622) must be performed and precision equipment is necessary.The EPA is aware of the hardship this imposes on some affected entities and has determined that an alternative method may be used. The specified alternative (ASTM D4294), will produce results of equivalent accuracy and repeatability. SCE&G currently uses this alternative method.
The EDGs can operate safely and reliably on either hi h or low sulfur fuel, although there have been reports of diesel engines damaged the drier low sulfur fuel. Since the VCSNS EDGs are not considered motor vehicles by he EPA, the regulations allow the use of high sulfur fuel. SCE&G has decided to continue to purchase and use the high sulfur fuel. As such these alternative tests provide an equivalent level of quality and safety.
The heat flux hot channel factor FQ(z)is the maximum local heat flux on the surface of a fuel rod at core elevation z, divided by the average fuel rod heat flux. FQ(z)is shown to be within its limits by performing periodic surveillances. It is possible for FQ(z) to increase between surveillances, which is the reason for the TS requirement to compare the measured value with the maximum FQ(z) value from the previous measurement. If there is an increase, either the FQ(z) must be increased by 2.0% or the TS surveillance must be performed every 7 Effective Full Power Days (EFPD).
This penalty of 2.0% was based on the Westinghouse assumption that FQ(z) would not change by more than 2.0% between monthly flux maps. This assumption is based on the old methodology which did not take into account high amounts of burnable absorbers (includes IFBA), low leakage loading patterns, and 18 month fuel l
cycles. The Nuclear industry has seen increases between monthly surveillances as high as 5 or 6 percent over certain burnup ranges. Therefore, on a cycle specific 1
basis, a larger penalty on FQ(z) may be provided, using NRC approved methods.
i The additional nenalty in excess of 2.0% will be factored into the W(z) function, which is a cycle' specific function that accounts for power distribution transients that occur during normal power operations, and is provided in the COLR. This revision to the WCAP has been reviewed and approved by the NRC. This revision provides an equivalent level of safety and quality as that provided in the original version of the WCAP.
Attachment lll TSP 940003 Page 1 of 3
)
NO SIGNIFICANT HAZARDS EVALUATION FOR ADMINISTRATIVE CHANGES IN THE VIRGIL C. SUMMER NUCLEAR STATION TECHNICAL SPECIFICATIONS Description of Amendment Request South Carolina Electric & Gas Company (SCE&G) proposes to modify the Virgil C.
Summer Nuclear Station (VCSNS) Technical Specifications (TS) to permit alternative, equivalent testing methods to be performed on the diesel fuel purchased for the Emergency Diesel Generators (EDG). These alternative methods are necessary due to recent changes to Environmental Protection Agency (EPA) regulations that are designed to limit the use of high sulfur fuels. Due to the new requirement that high sulfur vehicle fuels (>0.05 weight-percent sulfur) have a blue dye added for identification, the VCSNS TS are affected. The verification of fuel color and clarity (TS 3/4.8.1.1.2) which checks for water content and particulate, must be met by other testing. An alternative test, ASTM D1796 or D2709, utilizes a centrifuge to separate out the water and particulate matter. SCE&G desires the option of having both ASTM D1796 and D2709 available as alternate methods.
The limit on sulfur content requires very accurate testing. The recommended testing method requires very expensive, high precision equipment. An alternative method utilizes equipment that has the same accuracy and repeatability, but is less expensive and is currently being used by SCE&G. This ASTM met bod (ASTM D4294), has been determined to be equivalent by the EPA. SCE&G formally requests permission to add D4294 as an approved test method for determining sulfur content.
Due to the evolution of ASTM Standards, SCE&G is proposing that the modified VCSNS TS state that the required testing will be performed in accordance with the applicable ASTM Standard. This will permit the inclusion of future equivalent ASTM Standards to be incorporated into our testing program via 10 CFR 50.59 changes.
The above referenced standards have been determined to be equivalent to the currently approved ASTM Standards. SCE&G requests the flexibility to adopt other applicable ASTM Standards that are determined to be equivalent and acceptable under 10 CFR 50.59.
SCE&G also proposes to modify the VCSNS TS by changing the revision level of WCAP-10216-P-A, " Relaxation of Constant Axial Offset Control-FQ Surveillance Technical Specification", referenced in TS 6.9.1.11. This pertains to the FQ(z) TS (TS 3.2.1 and 3.2.2) and is necessary since Westinghouse revised their methodology in determining FQ(z).This revised WCAP has been reviewed and approved by the NRC, TS 3.2.1 and 3.2.2 are not affected by this change. perating Limits for future cyc and will be used by VCSNS to determine the Core O
i Attachment til TSP 940003 Page 2 of 3 l
Basis for No Significant Hazards Consideration Determination SCE&G has evaluated the proposed change to the VCSNS TS described above against the Significant Hazards Criteria listed in 10 CFR 50.92 and has determined that the changes do not involve any significant hazards for the following reasons:
1.
The probability or consequences of an accident previously evaluated is not significantlyincreased.
The change in testing methods for the EDG fuel oil has no impact on the arobability or consec;uences of any design basis accident. These tests have 3een determined to be equivalent to the previously approved testing methods and are needed due to changes in the EPA's regulations rec arding sulfur in motor vehicle fuels. The dye used to identify high sulfur fus s will have no adverse affect on the performance of the EDGs.The proposed testing assures a continued high level of quality of the diesel fuel received and stored on site.
The change in revision level of a reference in TS section 6.9.1.11 has no impact on the probability of occurrence or consequences of any design basis accident.
All design and performance criteria will continue to be met and no new single failure mechamsms will be created. The change in revision level for WCAP-10216-P-A does not involve any alterations to plant equipment or procedures which could affect any operational modes or accident precursors. This change only incor aorates by reference, the methodology for d etermining the penalty to be used in calculating Core Operating Limits. This methodology allows the penalty to be cycle specific and is primarily affected by the core configuration.
This penalty is used for normal operation and provides more conservatism to the core operation for the cycle.
2.
Create the possibility of a new or different kind of accident from any accident previously evaluated.
The change in testing methods for the EDG fuel oil will not create the possibility of a new or different kind of accident from any accident previously evaluated. These tests have been determined by the EPA and other organizations to be equivalent to the previously approved testing methods.
The effect of the blue dye, used to identify high sultur fuels, on the performance of the EDGs has been evaluated and determined to be insignificant. The testing proposed assures a continued high level of quality for the diesel fuel received and stored on site.
The change in revision level of a reference in TS section 6.9.1.11 has no impact on the probability of occurrence or consequences of any design basis accident.
All design and performance criteria will continue to be met and no new single failure mechanisms will be created. The change in revision level for WCAP-10216-P-A does not involve any alterations to plant equipment or procedures 4
which could affect any operational modes or accident precursors. This change only incor aorates by reference, the methodology for determining the penalty to be usec in calculating Core Operating Limits. This methodology allows the penalty to be cycle s aecific and is primarily affected by the core configuration.
i This penalty is used for normal operation and provides more conservatism to the core operation for the cycle.
.. _ ~
Attachment lli
-TSP 940003 Page 3 of 3 3.
Involve a significant reduction in a margin of safety.
The change in testing methods for the EDG fuel oil will not involve a -
significant reduction in a margin of safety. The proposed testing methods have been determined to be equivalent to the previously approved testing methods. The test for sulfur assures that the sulfur content is within the allowable range for weight percent. The test for color and clarity assures that the fuel is relatively free of water and particulate contaminants. The proposed test provide at least an equivalent level of quality and repeatability for the fuel oil analysis, thus assuring that the margin of safety is not reduced.
The change in revision level of a reference in TS section 6.9.1.11 does not change the proposed reload design or safety analysis limits for each cycle reload core. The asr.ociated change to WCAP-10216-P-A due to the rev!< ion will be specifically evaluated using approved rel,oad des,ign methods. The larger penalty actually provides for an increase in margin during certain burnup ranges. Since t,e safety analysis limits are unaffected, and the cycle specific analysis will show that the analysis limits are met, the change proposed will have no adverse impact on a margin of safety.
I i
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