ML20099D299

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Submits Addl Info Re 811001 Proposed Emergency Diesel Generator Fuel Oil Tech Spec Amend Re Maint of Quality Fuel in Fuel Oil Storage Tanks,Clarification of Removal of Accumulated Water from Oil Tanks & Periodic Cleaning
ML20099D299
Person / Time
Site: Peach Bottom  Constellation icon.png
Issue date: 11/15/1984
From: Daltroff S
PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To: Stolz J
Office of Nuclear Reactor Regulation
References
NUDOCS 8411200295
Download: ML20099D299 (10)
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Text

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November.15, 1984-Docket Nos. 50-277 .50-278 Mr.~Jonn F. Stolz, Chief ' Operating Reactors Branch No. 4 Division of Licensing U.S.> Nuclear Regulatory Commission Washington, D.C. 20555

SUBJECT:

Emergency Diesel Generator Fuel Oil -Quality Technical Specification Changes References..(1) - Letter to E. G. Bauer, Jr., from J. F. Stolz, dated September 14, 1984 (2) Application for Amendment of Operating License Requesting Change to Peach Bottom Technical Specification Relating to the Emergency Diesel Generator Fuel Oil System, filed October 1, 1981 Dear Mr. Stolz Your letter to E. G. Bauer, Jr., dated September 14, 1984, requested additional information on Philadelphia Electric Company's proposed Emercency Diesel Generator Fuel Oil Technical Specification Amendment. Philadelphia Electric Company, by phone conversation dated November 2, 1984 from W. M. Alden to Mr. Gerald A. Gears of your staff, requested that our response time to the above referenced letter be extended to 60 days. This extension was found acceptable by Mr. Gears. The information requested and our responses are listed below. Request la. Provide detail justification to show that your proposed and/or current technical specifications will result in the --maintenance of quality fuel oil stored in the fuel oil storage tanks as being equivalent to fuel oil that is sampled and analyzed in accordance with the guidelines of p R.G. 1.137 Positions C.2.a through C.2.c. Ohhy gb 9 ~

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' ' ^ ' - l ww L w c (Page;2;, PMW l. @c f:, '#;% a- > 4 ~c ~ v n L e. ' q' ' - -* - - 4~ %4 : ~ .." " s i kW u + 'V J T. u + m7 &nw.mg &n MQ f w M " %w e. R f: ;q e c;& au J- <T2 -> J k. M. = v6.g. l asanama r 4 j ~# * %: V. Wdy. m C3 A. ;J. e-74% % 4 QW M The f foursdieselbfue1Poil" storage i tanksiatL Peach, BottomiN _ >J' , - hj h ", A["N M AtomicLPowerJStation are; sampled}on'aJguarterlyibasisDin( "q ' y~4 j t fM4 spyaccordance;with.ASTIt-D270-75 (Standard Hethod:ofl Sampling + 7^. f ~ $y ~' DPetroleusland 1Petrole'ue Products). sThe samples;are sent.to? ' ,j R 5the.PhiladelphiajElectric CompanyiChemistry1 Laboratorytand.' l w , d 6,

, l are" analysed foriall,'of the parametersslistedlin ASTIt-D975-1 M

4 bh{ 4 p m 77,.l Table 11L(Detailed: Requirements for Diesel Fuel Oils).: 4 S g c, ' JPeacht Botton' Surveillance Test:ST-8.l'.7 controisithe, e.,, 1: " d % ', 6

sampling;and testing ofjthe dieselcfuel' oil' storage tanks;, N

-) ? KN. ST-8.1.7 is' written fin accordancelwith Regulatory Guide i, ' w. SystemsLfore Standby DieseliGenerators)Eandf " ^ 1.137 (Fuelioilt l i& T ' %rTis'issuedfandJperformed'once per quarter.- N; 'o y . L + <+, ~ fL

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the!:additionMof ^ new fuel oilito the' dieseli storage N

' tanks,<two.samplesfof.-fuel _-oil:are obtained1from the fuel J i %^ Joil:deliveryLLtruck'in accordance(withmASTM D270-75. Sample t e i $1'is~immediately testedion-site for specific gravity,-water 1 p- .and: sediment,~-andl viscosity. It'any.of the,11mits'are: 1 Q-exceeded for1the on-site test 1for specific gravity, wateri K and~ sediment,'or viscositys the fuel oil is returned to the W supplie'r. Sampla'92'is sent,to the Philadelphia Electric.. ll 0; ' Compeny Chemistry Laboratory andiis analysed for all of the T parameters listed in ASTM D975-77,. Table,1. Peach'Botton f' Surveillance Test ST-8.1.8 controls the? sampling and testing [ 2 of delivery truck fuel oil. ST-8.1.8 is written in i.^ accordance~with Regulatory Guide 1.137 and is' issued and j [ performed.for'each delivery of diesel fuel oil. t [ ST-8.1.7 and ST-8.1.8 adequately sample'and test diesel' fuel i oil in accordance with Regulatory Guide 1.137, Sections j C.2.a through Cs2.c. l h. i t l iI, Regulatory Guide'l.137, Position C.2.a, among other things, jF recommends-'that~a diesel generator'be declared inoperable if H. the normal storage tank oil for that diesel generator cannot I/- meet the acceptance criteria for viscosity, or water and LJ ' sediment as specifled in ASTM D975-77, Table 1. The Peach l Botton Plant Operational' Review Committee (PORC) reviewed U this action statement and concluded that the intent of i [8 , declaring a diesel generator inoperable can be met by i ^' removing the diesel oil storage tank avith the suspected oil iy from service and supplying fuel oil to four diesels from the L remaining three storage'~ tanks., The minimum fuel oil volume [ O requirements of the technical specifications can also be met in this' configuration. - Justification for this position'is j- . discussed in more detail in Responses 2a and 2b, below. t m [ I r, i[; I .I r a b [f 1 3 c,n x ^ .1 l ( .p ~ ,e A [k Q, 4 (L e +,

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h r. + =. Mr'. John ~F. Stolz: November, 15, 1984 Page 3 C' Our proposed diesel' generator fuel 1oll Technical Specification 4.9. A.1.d ' stated the following s d. At'least once periquarter, a sample of diesel

fuel, taken from each main fuel tank in accordance with ASTM-D270-75,.shall be checked.

.for quality...The quality shall be within the-acceptance limits specified in Table 1 of ASTM- 'D975-77 when checked for water, sediment and' viscosity and logged.- If the fuel qualitycis not within the acceptance limits, then that main fuel-oil tank will be isolated-from-the system - with'the associated diesel being supplied by one of the' remaining main fuel oil tanks. This,will be amended to delete-the words, "when checked for water, sediment'and viscosity". Presently, we test our diesel fuel oil stored in the four-storage tanks for all of the parameters listed in AGTM D975-77, Table 1. By deleting these words from our proposed technical specification, the quarterly samples of-diesel fuel oil will continue.to be tected in accordance with Regulatory Guide 1.137. Request' lb. Provide clarifications as to why positions C.2.d through C.2.f (removal of accumulated water from the fuel oil tanks and periodic fuel oil tank cleaning) were not included in your proposed technical specifications. . Response Position C.2.d In over ten' years of diesel generator operation at Peach Bottom,. encompassing over 2800 diesel generator surveillance

tests, the fuel oil sampling program has not demonstrated any instances of degraded diesel generator operability or diesel generator failurea associated with excessive amounts of water in the' fuel oil.

The four storage tanks are sampled on a quarterly basis as described in Response la. In the event that the quarterly samples indicate excessive amounts of water in the fuel oil, the appropriate action by the station would be to remove the water.from.the affected tank.- In addition, a review of the fuel oil sample analysis results over the last 3 years i %4

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~ + , 10 b"? < W;9p m 3 e 4~ ' y 4 y; ' Mr. JJohn: F.;Stolz : ", g - + ! _ g; _ + _ A, , l, ' ; Page 4. Li-4 r 6 ,m, q j-4 x. [ 4 1 (,,1 ~ c r .. e^. - %dicates '. that ithe. limitl forfwater tin = the1 diesel (fuel oil: E" - J, from:theistoragestanksihas.not been exceeded.. y*c lInLlightcfstheImbovefinformation,-lPhiladelphiaElectric;[."% . Company believesithat:: draining lthe-diesel generator fuelToil? 4 u

storage tanks of accumulated. water on a. routine basis,Las

/recommendedLby Regulatory Guide 1.137, Section C.2.d, willi i 'not increase the: reliability of;thesdiesel'generatorslat-l, Peach Botton.sinceryears of sampling have'indicatedithatw -accumulated water;is-not.a problem =in the' diesel fuel oil; }- 1atoragettanWs. 1 U l Jd ) Position C.2.ei I '3

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The four diesel generators at Peach Bottom Atomic 4 Power Statica are' tested onfa weekly basis.by running eachl diesel'

. generator aturated loadtfor one hour. -At the completion of c the. hourly ~run,-a.one-liter sample-is obtained'from.the base of.the diesel.generatoredayetank. The sample'is visually a checked for water. ;If' water is present, an' additional liter, sample'is obtainedcfrom the base of the day tank and- / visually checked for wator; This process'.is" repeated until . A portion of Peach' .no water is present in-the sample". ~Botton Surveillance Test ST-8.l' specifies the sampling method described above. ST-8.1 is issued and1 performed'once per week. This sampling is.' performed'in~accordance with Regulatory Guide 1.137, Section C.2.e. I Position C.2.f W once every ten years, the four diesel generator fuel oil storage tanks ~are drained, any accumulated sediment is removed, and the tanks are cleaned using a sodium hypochlorite solution. Peach Botton Surveillance Test ST-8.1.4A-D and Maintenance Procedure M-52.13 specify the frequency and method for cleaning the diesel generator fuel oil storage tanks. This cleaning is performed in accordance L.with' Regulatory Guide 1.137, Section C.2.f. All four storage tanks'were last drained and cleaned in'May-June, 1981.' TheLeffectiveness of'the Technical Specifications is . enhanced by limiting its. scope to the essential operability and-surveillance requirements. 'The benetit of limiting the volume.of theLTechnical Specifications was acknowledged in s ps r'

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74 W f Q, ; 4,f ?. ' +, ' &,~(3, ..m e y z. y y,. ~-( Y ?y ', i'Y b, j + s + g s [ p,,_ (_ 'W s LV n y /the5NRC!siproposed l rule' change ~ Lto -10 CFR! 50.'36Wpublished D " W NMarch530,11982a 4For this reason,>and considering the F. W ~;' n M' ys. {effectivenessioftemisting' plant! Procedures, Lit;is(not; v. i %;Ladvantageous :toyincorporate1the numsrous > routine /: preventive / 2 maintenance: practices into;the?TechnicallSpecifications.w - C p t. a-v: a 1 s Recuest g m . c,: e m Lic. 11f0the; operation [of a diesel-generator'were toI e required b lfor'a prolonged period ~resulting in the replenishment:off ~ fueltoil without-interrupting; operation of-the diesel l m a - generator, whattprovi'sions:have been'madefin:th'e' design;of ' the fuel oil storage-fills ystem and!what operating' s procedures arefin place to minimisat the-creation;of. L> aturbulence'of:the sediment in the-botton:of the storage-. + 4

tank? l Stirring of this sediment!during addition'of new fuel.

l >a appears'to havait_he; potential'of causing.the'overall quality- ' of the ' fuel :to'~.become unacceptable and could potentially ' lead:tocthe degradation-or failure of.the diesel generator.

Considering your: system' design, provide your. intended mode q

l, of operationEto preclude the'above.from occurring. (R.G. = '1;137' Position'.C.2.g). ~' Lo ( 1 - f-

Response

h Stirring of sediment.during the addition of new fuel oil l will=not lead to the degradation or failure of the associated diesel generators. As shown on P&ID M-323, a basket strainer-'is provided on the' fill connection to prevent solid particles or debris from entering the' fuel oil . storage tanks._ In addition,.'a strainer is'provided on each. [ diesel oil transfer pump' suction line'to prevent solid particles or' debris from entering the day tank. This is l followed'by a' basket strainer on the suction of the engine-I driven and-D.C.' motor-driven fuel oil ~ pumps, and a duplex filter on the~ fuel. oil pump discharge header. These latter two devices are equipped with differential pressure switches l.' which will actuate alarms at the local control panel and the L common diesel generator-trouble alarm in the control room before the elements' become clogged to the point' where fuel oil flow is degraded. .In addition, the fuel oil. transfer pump suction is taken l approximately four inches from the bottom near one end of the tank. The fill nossle is located'at the opposite end of the tank and discharges through the top of the tank. This is nearly 43. feet horizontally and 12 feet vertically away fron,the suction line.- Sediment will not be' stirred when -the tank is replenished because agitation of the fuel oil x <;f_. g' [L[ 4 + +

J.-^ 4 ? Mr. John-F./Stolz' ' November.15, 1984 W. Page 6 1 would'be limited to'the area df.rectly underneathLthe fill nozzle. r p The-combined ~effect of the strainers, the duplex filter and the tank configuration is such that sediment and turbulance is not a' problem at Peach Bottom. Request 2a. Provide an up-to-date. fuel oil ~ storage system piping diagram and describe how you' comply with GDC-17 independence requirement for on-site ac pc'wer systems when operating four diesels from three storage tanks containing a minimum of 104,000 gallons of fuel.

Response

An up-to-date copy of the diosal generator fuel oil storage and transfer system P&ID (P&ID M-323) is provided as to this responso., As shown on this drawing, each of the four diosol generators is provided with a separate fuel oil storage tank, fuel oil day tank, and fuel oil transfer pump. Each fuel oil day tank can be filled from any of the storage tanks uiting any of the fuel oil transfer pumps. This provision was included'in the design so that in the ovent of fuel oi2 contamination, or a fuel oil transfer pump failure, the maximum number of diesel generators will still be available to provido emergency power. In the event that unacceptablo fuel oil is found in one main tank, PEco believes that the associated diesel generator can remain operable for the following reasons: 1. The associated diosol generator day tank has sufficient capacity to carry the diesel generator for approximately 2 1/2 hours without makeup from the fuel oil storage tank. Provided the unacceptable oil has not reached the day tank, this 2 1/2 hours allown sufficient timo for the operators to provide makeup from an alternato fuel oil storage tank. 2. AC power to each diosol ongine fuel oil transfor pump is provided by the omorgency bus associated with that diosol. Fuel oil cross tien are available to provido auction to each of these indopondent pumps. This design ensures that the electrical independenco required by GDC-17 is maintained should the operation of four diosols from throo storage tanks be necessary.

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13. G - : PEcoJbelieves?thatideclaring a diesel generator
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.m o j V tho' fuel: oil; storage:tanksils:not consistent:with the- ?,,(objectiveEof: maximizing:thefavailability and a: -reliability of the'onsite3 emergency AC power system. 4 7, ? ,c p; f4'. f EIf'a" diesel generator isfdeclared inoperable ~because' lof unacceptable ~ fuel--oil in-the associated.' storage ?: JtankF then the-plant wouldibe requiredLto operate. , +w under ithe existing ' Technic,al Specification - '3 M. ,l requirements"for'three diesel generators in' service.. ? "l 7 These require daily. surveillance testing of the.. j 1 o? remaining diesel: generators. This:is not consistent- "I l' f with.the. intent of NRC Generic LetterL84-15,: In which ~ i Lthe reduction.of' extraneous diesel : surveillance-Jtesting is one'of the recurring themesLfor increasing m.. 1 diesel generator reliability.- y 52 The' comprehensive fuelfoilfoampling=andianalysis </" , program discussed in Response la will. provide positive

tracking of fuel oil quality in each of.the four

.d.iesel' fuel oil storage. tanks. Thus, the station will be provided ample assurance that. acceptable fuel oil-is present'in the remaining tanks, should one tank. Lbecome unavailable. Inflight of the above, we believe that the proposed Technical Specification change meets the-intent of GDC-17,. while still maximizing the reliability of the diesel . generators'and the entire standby onsite; power system. Request l 2b. - Describe and provide the results of an analysis to show how the minimum stored fuel of 104,000 gallons meets the technical specification requirement for operation of the ,four' diesels for a period of seven days. 8 f Resoonse The existing Technical Specification limit for the minimum i volume of on-site diesel fuel is in excess of the required r. ' amount of fuel oil needed to sustain fell-load operation'of three diesel generators for a seven day period. As discussed 11n Updated FSAR Section 8.5 and the Technical . Specification Bases, three diesel generators will carry ~

sufficient. engineered safeguards equipment to ensure safe shutdown >of both units, assuming a hypothetical design basis accident-on one unit.

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n <. . -g< y g f./ F +[ Fm .c ~ y .} + ~ 74-Hg,."JohnF.[S'tols ~ v e,. ~ _.i f, 15, 1984: d 1Novembe'r + V Page:8 "4 ~ / [. u ,e n .r e e 3 L NThe 104',000(gallon'miniaum on~ site fuel" oil' requirement is ~ 4 based.on the full: load; operation.of4three. diesel generators.. "/ ~ l for.seven' days..'Each di,esel-generatorJconsumes 14 .approximately 200. gallons L per.s houri;at : full? load ' operation. . Therefore, threefdiesel generators; operating'at full' load 4

for aJperlod of1seven' days would consume-approximatelyi 100,800 gallons of; fuel. oil;.-

'y 1 e The' total diesel,g'enerator'fuelLolliavailable on-siteIls ^ s

monitored on'a daily? basis'in Peach Botton-Surveillance'-Test-ST-9.1.25. 1A flag point
is establishedfat. 122,000 gallons-1 1 total diesel generator' fueltoiluon-site..When this flag'

~ '"' ' point is reached,the: PEco Fuels Division. is contacted to V make 'rrangementstfor supplying additional: fuel oil to the a station. This flag point ensures that'the total diesel': Lge'neratorffuel-oil'available on-site is maintained well.. ' above the minimum Technical Specification requirement of. 104,000 gallons. b .r. If you require further information,.please do not hesitate to contact us. Very truly

ours,

.) ' / 5 9 Attachment t cc A. R. Blough, Site Inspector l Document Control Desk' t W W p. 'f .,a..;, e_, _.. _, = _,_..., _ _. .._.,___.,,,m.,

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