ML17222A687
| ML17222A687 | |
| Person / Time | |
|---|---|
| Site: | Mcguire, Saint Lucie, McGuire, 05000000 |
| Issue date: | 02/07/1989 |
| From: | NRC |
| To: | |
| Shared Package | |
| ML17222A685 | List: |
| References | |
| TAC-53255, TAC-53256, NUDOCS 8902150085 | |
| Download: ML17222A687 (21) | |
Text
ATT,".CH.'!E!!T SAFETY EVALUATION REPORT SURVE ILLANCE REQUIREMENTS FOR DIESEL FUEL OIL AT MCGUIRE NUCLEAR STATION UNITS I 5 2 DOCKET NO'S 50-369 AND 50-370 (TACS 53255 8 53256) p~o~~soo8g s9opo7 p
ADOCN 05ooo389 PNU
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By letter dated November 18, 1983, Duke Power Company proposed changes to the surveillance requirements for diesel fuel oil in Technical Specification 4.8.1.1.2 for HcGuire Nuclear Station Units 1 and 2.
In general, the proposed changes involve replacing fuel oil tests presently required by the Technical Specifications with different tests which the licensee states are (1} more effective in detecting Unsatisfactory fuel oil, (2) the tests can be performed onsite, and (3) they are simpler and less expensive to perform.
Attachments 1 and 2 to this report are copies of the applicable Technical Specifications in present form and revised form, respectively.
The following is the staff's evaluation of the proposed Technical Specification changes.
The most significant change is the deletion of requirements for testing stored fuel oil in accordance with ASTH 02274-70 every 92 days.
In lieu of the test, the licensee proposes to test stored fuel oil for particulate concentrations every 31 days in accordance with ASTH 02276-78.
The rationale for this change is that the proposed test address the actual condition of the fuel oil that will be pumped to the diesel generators in terms of particulate (solid} matter which could impair diesel generator operation or result in diesel generator unavailability.
The current surveillance requirements (AS'2274-70}
are oriented to predicting the tendancy of fuel oil to oxidize and form particulates during long term storage, but do not address particulates that may already exist.
In addition, ASTH D2274-70 test results may not
accurately correlate with actual fuel condition because test results tend to vary depending on factors such as storage conditions.
Also, the proposed ASTH 02276-78 tests would be performed every 31 days as opposed to every 92 days for ASTH D2274-70.
The more frequent testing for actual particulates in the stored fuel oil would piovide better data on fuel condition at the time of test as well as the tendancy for formation of particulates under site storage conditions.
The proposed tests would, therefore, be more conservative in establishing adeq'uacy of stored fuel than the present requirements.
In its review of the licensee's justification, the staff discussed the comparability of ASTH D2274-70 and ASTH 022?6-78 with the applicant and his consultant, with representatives of the U.S. Naval Research Laboratory and the U.S. Navy Petroleum Office.
Based on the dis'cussions, the staff agrees with the licensee that the proposal for testing per ASTH 02276-78 every 31 days in lieu of ASTH D2274-70 every 92 day is more conservative and is, therefore, acceptable.
4 Other proposed changes include (a) replacing the lfater and Sediment t'est by centrifuge on new fuel per ASTH D1796 with the Clear and Bright test per ASTH 04176-82, (b) use of optional methods of verifying fuel gravity by testing and comparing with the supplier's certification, (c) allow sulfur analysis to be performed in accordance with ASTH D1552 or ASTH
- 02262, and (d) extend the time limit for obtaining ASTH D975 test results on new fuel from 14 days to 31 days.
The staff has reviewed the Clear and Bright test (ASTH 4]76-82), including a demonstratioA of the test principles at the Naval Fuel Laboratory, Norfolk, Yirginia.
Based on our review and the demonstration, the staff concurs with the licensee and concludes that the Clear and Srfght test fs more sensitive fn determining the presence of water and sediment fn fuel ofl than the Water and Sediment test by centrifuge (ASTH 01796),
and the proposed change is, therefore, acceptable.
The use of optional methods of verify new fuel gravity prior to storing I
by testing and comparing with the suppliers certification is proposed by the licensee as a means of simplifying new fuel acceptance procedures.
The Justification for this change fs that any contamination of fuel oil-during transportation would be indicated by changes in flash point, gravity or viscosity, or appearance.
Incorrect flash pofnt will be detected by testing as discussed later fn this report.
Any contamination which will alter the fuel oil appearance will be detected by the Clear and Brfght test discussed previously fn this report.
Itfth tests for flash point and appearance as additional indicators, a
verification of fuel oil gravity by testing and comparing to the supplier's certification will provide the necessary assurance that the new fuel is within specification limits.
The staff concurs with the licensee's proposal and concludes that the verification of fuel oil gravity by optional Nethods fs acceptable.
ASTH D975 requirements are such that testing new fuel ofl for sulfur content may only be performed in accordance with ASSN D129.
Federal diesel specification VV-F-800C and ASTM D39&, Specification for Fuel Ofl, however, allow the use of AS'1552 and ASTH D2262 tests for sulfur determination in No.
2 grade fuel ofl.
The staff recognizes both of the above fuel oil specifications and believes that obtaining test results by their use will be equivalent to results obtained by use of ASTH D126 and, therefore, concludes that the proposed alternate methods of determining sulfur are acceptable.
At present, the Technical Specification require new fuel oil to be testing for conformance to the limits of the respective fuel oil properties listed in Table 1 of ASTN 0975, and the test results be available within I4 days following fuel oil delivery.
Under the licensee's proposed surveillance program, the fuel oil properties which, if not in conformance with requirements, would have the most detrimental and imnediate impact on diesel generator operation (flash point viscosity or gravity, water and sediment) are checked for conformance to ASTli D975 limits inmdiately prior to accepting the new fuel.
The remaining fuel oil properties are those which might impact diesel generato~
performance only on a long term basis.
Therefore, the licensee's proposal to extend the time for obtaining test results for the remaining fuel oil properties from l4 days to 3l days would not adversely effect diesel generator reliability.
The staff concurs with the licensee and concludes that this time extension is acceptable.
The proposed changes to the Technical Specifications include deleting the requirement for testing of fuel oil in accordance with AS'975 requirements on a 92 day basis.
The licensee's rationale for this deletion is that the fuel oil properties which can effect diesel generator performance (flash point, cetane number, viscosity, Cloud point) do not change during storage.
If these properties are within specification when the fuel oil is placed in storage, they will remain
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A within specification unless other non-specification petroleum products are added to the storage tanks.
The addition of non-specification petroleum products is precluded by the licensee's proposed new fuel surveillance program as detailed above.
Over prolonged period stored fuel can oxidize and form particulates which, fn significant C
concentrations, cou1d impair diesel generator performance.
Partfculate concentrations and bacteria concentrations are the only things that will change in stored fuel oil.
Particulate concentrations will be monitored every 31 days as discussed previously in this report.
Sacterfa growth wi-ll be prevented by perfodfc removal of water from the storage tanks as discussed later in this report.
Considering that the fuel oil properties will not change fn storage, and that fuel oil conditions which could effect diesel generator operation will be closely monitored (on a
31 day basis), further testing of stored fuel fn accordance with AS'975 every 92 days will not provide any additional data nor improve diesel generator reliability and, therefore, can be deleted.
The staff concurs with the licensee's justification and concludes that the proposed deletion fs acceptable.
The licensee has also proposed two additions to the fuel ofl surveillance Technical Speciffcations.
These include (a) testing new fuel for flash point before acceptance, and (b) testing for and draining
~ater from the fuel oil storage tanks every 3l days.
The flash point test provides an additional fndfcatfon that new fuel oil fs.within specification limits, thereby reducing the possibility of adding "bad fuel" to the fuel oil already fn storage.
The requirement to drain accumulated water from the storage tanks every 3l days will be of
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considerable value in reducing.the possibility of bacteria contamination of the stored fuel, in minimizing the formation of corrosion products on the bottom of the storage
- tank, and preventing water from contaminating the fuel oil transfer system and the diesel generators fuel systems.
Both of the above additions represent a more conservative approach to maintaining quality diesel fuel and diesel generator reliability.
The staff concurs with the licensee and, therefore, concludes the above additions are acceptable.
In conclusion, the staff finds that the changes to the present surveillance requirements for diesel fuel oil in Technical Specification 4.8. 1.1.2 as proposed by the licensee for HcGuire Nuclea~ Station Units 1 and 2 will result in a more conservative approach to fuel oil surveillance.
The added conservatism coupled with the simplified testing of fuel oil will provide iamediate assurance in acceptance of quality fuel oil on delivery and maintenance of high quality stored fuel; this should increase diesel generator availability.
Therefore, the licensee's proposed Technical Specifications changes to the diesel'uel oil surveillance requirements, as detailed in the revised copy of the technical specifications Attachment 2 to this report, are acceptable.-
ELECTRICAL POWER SYSTEH SURVEILLANCE REOUIREHENTS Contfnued) 4.8. 1. 1.2 Each diesel generator shall be demonstrated OPERABLE:
a.
In accordance with the frequency specified in Table 4.8-1 on a STAGGEREO TEST BASIS by:
l.
Verifying the fuel level in the engine-mounted fuel tank, 2.
Verifying the fuel level fn the fuel storage tank, 3.
Verifying the fuel transfer pump <<an be started and transfers fuel from the storage systla to the engine-aounted
- tank, 4.
Verifying the diesel starts froe aabfent condftfon and accelerates to at least 900 rpm fn less than or equal to 10 seconds.
The generator voltage and frequency shall be 4160 x 420 volts and 60 i 1.2 Hz ~ithin 10 seconds. after the start signal.
The diesel generator shall be started for thfs test by using one of the following signals:
a)
Hanual.
t b)
Simulated loss. of-offsite power by itself.
c)
Simulated loss-of.offsfte power fn conjunction with an ESF actuation test 'signal.
d)
An ESF actuation test signal by itself.
5.
Verifying the generator fs synchronized, loaded to greater than or equal to 3685 kM in less than or equal to 60 seconds, and operates with a load greater than or equal to 36BS kQ for at least an additional 60 minutes, and 6.
Verifying the diesel generator is aligned to provide standby power to tne associated erne en busses.
At least once per 31 days and after each operation of the di re the period of operation was greater than or equal hour by che for and removing accumulated water from t ngine-mounted fuel tank, c.
At least once per 92 and from uel prior to additfon'o the storage
- tanks, by obtaining e of fuel ofl fn accordance with ASTH-0270-1975, and by ver ng the sample meets the following minimum requirements fs tested wit he specified time limits:
1.
As soo sample fs taken or prior to addi fuel to the ge tank verify fn accordance with'the test sp ed in STH-0975-77 that the sample has:
ST.
LUCIE - UNIT 2 3/4 8 3
ELECTRlCALeKSH SYST95 SURVE lLLANCE REOUlREKENTS (Cont< nued) b.
by rewovfng ace~lated
<<ater:
C~P ~C. m ou~A4 4al l)
From the 4ay~tank at least once per 31 days and after each occasfon
<<hen the dfesel fs operated for greater than 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, and 2)
Froa the storage tank at least once per 31 days.
c.
Sy saaplfng nor fuel of 1 1n accordance <<fth ASTN Oi057-d1 prfor to addftfon to the storage tanks and:
l) by verffyfng fn accordance <<fth the tests specfffed fn ASTI 0975-dl prfor to addftfon to the storage tanks that the saaple has:
a)
An O'I Cravfty of <<fthfn 0.3 degrees at 50'F or a specfffc gravfty of <<fthfn 0.0015 at 50/50'F, <<hen coepared to the supplfer's certfffcate or an absolute specfffc gravfty at 50/50'F of greater than or equal to p.d3 but less than or equal to 0.89 or an Apl gravfty at 50'F of greater than or equal to 27 degrees but less than or equal to 39 degrees.
b)
A kf~tfc vfscosfty ai NC of greater than or equal to 1.9 centfstokes.
but less than or equal to 5.1 cent1stokes, ff gravfty <<as not deterafned by coeparfson <<fth the supplfer's certfffcatfon, c)
A flash pofnt equal to or greater than 125'F, and
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d)
A clear and brfght appearance
<<fth proper color <<hen tested fn accordance <<fth ASTN 04175-82.
2) by verffyfng <<fthfn 31 days of obtafnfng the sample that the other propertfes specfffed fn Table 1 of ASTI I875-$ 1 are set <<hen tested fn accordance <<fth ASTN 0975-81 except that the analysfs
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ELECTRIC NEER SYSTEMS SVRVKILLANCK RKQV!RKHKNTS (Continued) for sul fur say be performed ln accordance eath ASTll 01552-70 or ASTll D2522-82.
4.
At least once every 31 days by obtaln<ng a saayle of fuel o)1 frow the storage tanks
$ n accordance e)th ASTN D22l4 ll, and verkfy)n9 that tota'. particulate contaainat)on
$ s less than 10 ay/7)ter shen checked
)n accordance with ASTN D227&OP, Nethod Ap~ Arne x f12 W~g-Wirz.
3/i 8 3b
ELECTRICAL REER SYSTEMS SURVEILLANCE RE UIRE)sENTS Continued b) c)
A wate~ and sediment content of less or equal to 0.05 volume percent.
A emetic vfscosfty 0 40 C of greater than equal to 1;9 ce
- stokes, but less than or equal'1 centistokes.
A specific vfty as specfffed by manufacturer 0 60/60'F of gr er than or e to 0.8 but less than or equa1 to 0.99 or API ity I 60IF of greater than or equal to 11 degrees ess than or equal to 47 degrees.
2.
Mfthfn 1 week after o nfng the s
le, verffy an impurity level'Of 1eSS tha mg Of fnSOlubleS 100 ml When teSted in accordance ASTH-02274-70.
3.
Nthfn eeks of obtaining the sample verify tha e other pro ties specified fn Table 1 of ASTH-0975-77 and latory de
- 1. 137 Position 2.a are met when tested in accordanc ith
'S'-0975-77.
At least once per 12 months by verifying that the automatic load sequence timers are OPERABLE with the interval between each. load b1ock within i 1 second of fts design interval.
At least once pen 18 nonths durtnd shutdown by:
Subjecttng the diesel to an inspection fn accordance with procedures prepared in conjunction with fts manufacturer's recommendatfons for this class of standby service.
2.
Verifying the generator capability to reject a load of g~eater than or equal to 453 kW while maintaining voltage at 4160 +
420 volts and frequency at 60.+ 1.2 Hz.
3.
Verffyfng the generator capability to reject a load of 3685 kM without tripping.
The generator voltage shall not exceed 4784 volts during and following the load rejection.
Sfaulatinp a loss-of-offsite power. by itself, and:
a)-
Verffyfng deenergfzatfon of the emergency busses and load shedding from the emergency busses.
b)
Verifying the diesel starts on the auto-start signal, energizes the emergency busses with permanently connected loads within 10 seconds, energfzei the auto-connected shut-down loads through the load sequencer and operates for greater than or equal to 5 minutes while fts generator is loaded with the shutdown loads.
After ener'gization, the steady. state voltage and frequency of the emergency busses shall be maintained at 4160 a 420 volts and 60 ~ 1.2 Hz
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during this test.
ST.
LUCIE - UNIT 2 3/4 6-4
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ELECTRICAL PASSER SYSTEMS SURVEILLANCE RE UIREMEHTS Continued 8a Verifying that the auto-connected loads to each diesel generator do not exceed the 2000-hour rating of 398S N.
9.
Verifying the diesel generator's capability to:
a)
Synchronize with the orrsfte peter source bafle the generator fs loaded ~fth fts emergency lotds upon a sfmulated restoration of offsfte parer, b)
Transfer fts loads to the offsfte peer
- source, and c)
Be restored to fts standby status.
10.
Verifying that ~fth the diesel generator operating fn a test mode (connected to its bus),
a simulated safety injection signal ove~rides the test mode by (1) returning.the diesel generator to standby operation and (2) autoaatfctlly energizes the emergency loads fifth offifte paver.
11.
Verifying that the fuel transfer pump transfers fuel from etch fuel stoppage tank to the engfne-mounted tanks of etch diesel vfa the instilled cross connectfon lfnes.
At least once per 10 yetrs or after any modifications &fch could affect diesel generator interdependence by startfng the 4iesel generators simultaneously, during shutdown, and verifying that the diesel generators accelerate to at least 900 rpm fn less than or equal to 10 seconds.
At least once pen 10 yeses by:
Drafnfng each fuel of 1 storage
- tank, removfng the accumulated sediment and cleaning the tank using a sodium hypochlorfte
- so1utfon, and 2.
Per'forafng a pressure test of those portions of the 4fesel fuel ofl system designed to Section III, subsection ND of the ASME Code at a test pressure equal to 110% of the systew design pressures ST.
LUCIE - UN?T 2 3/4 8 6
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DATED:
February 7, 1989 I
AMENDMENT NO. 39 TO FACILITY OPERATING LICENSE HO.
NPF ST.
LUCIE, UNIT 2 JDoc~et+ile HRC
& Loca I"PDRs PDI I-2 Reading S.
Varga, 14/E/4 G. Lainas, 14/H/3 H. Berkow D. Miller J. Norris OGC-WF D. Hagan, 3302 MNBB E. Jordan, 3302 MHBB B. Grimes, 9/A/2 T.
Meek (4), Pl-137 Wanda Jones, P-130A E. Butcher, 11/F/23 ACRS (10)
GPA/PA ARM/LFMB B.
Wi 1 son, R-II cc:
Plant Service list
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