ML20074B078

Forwards Draft Revs to Responses to Questions 430.68,430.72, 430.75 & 430.114 Re Diesel Generator Auxiliary Sys.Changes Will Be Formally Incorporated Into FSAR Rev Scheduled for June 1983

ML20074B078
Person / Time
Site:	Limerick
Issue date:	05/13/1983
From:	Bradley E PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Schwencer A Office of Nuclear Reactor Regulation
References
NUDOCS 8305180419
Download: ML20074B078 (21)

Text

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e-PHILADELPHIA ELECTRIC CON'PANY 2301 M ARKET STREET P.O. BOX 8699 f

PHILADELPHIA. PA.19101 Cuw A R D G. B AU ER. J R. 2isi e4i-ww

.......s.o..,

a.o.. ..am.a..s.6 IsUG ENE J. BR ADLEY associate es.a.a6 cousesst DON ALD SLANKEN i CUDOLPH A. CHILLEMI

/ 9 C. C. MIR K H A LL T. H. M AHER CORN ELL ,

PAUL AUERBACH assista.T o.ms. A6 c ou-sek

)

EDW ARD J. CULLEN. J R.

THOM AS H. MILLER. J R.

l'.E N E A. Mc M EN N A assesTaNT CoWNsEL Mr. A. Schwencer, Chief Licensing Branch No. 2 Division of Licensing U. S. Nucicar Regulatory Commission Washington, DC 20555

Subject:

Limerick Generating Station, Units 1 and 2 Request for Information from the Power Systems Branch

Reference:

Meeting with the Power System Branch Reviewer s E. Tomlinson, and Philadelphia Electric Company on March 9-10, 1983

Dear Mr. Schwencer:

The attached documents are draft revisions to the responses to questions 430.68, .72, .7S, and .114.

These changes will be formally incorporated into the FSAR revision scheduled for June, 1983.

Sincerely, Euge e J. radley JTR/bls/D-12 00 cc: See Attached Service List 8305180419 830513 DR ADOCK 05000352 PDR

0 - . .

cc: Judge Lawrence Brenner (w/o enclosure)

Judge Richard F. Cole (w/o enclosure)

Judge Peter A. Morris (w/o enclosure)

Troy B. Conner, Jr. , Esq. (w/o enclosure)

Ann P. Ilodgdon (w/o enclosure)

Mr. Frank R. Romano (w/o enclosure)

Mr. Robert L. Anthony (w/o enclosure)

Mr. Marvin I. Lewis (w/o enclosure)

Judith A. Dorsey, Esq. (w/o enclosure)

Charles W. Elliott, Esq. (w/o enclosure)

Mr. Alan J. Nogee (w/o enclosure)

Thomas Y. Au, Esq. (w/o enclosure)

Mr. Thomas Gerusky (w/o enclosure)

Director, Pennsylvania Emergency Management Agency (w/o enclosure)

Mr. Steven P.11ershey (w/o enclosure)

James M. Neill, Esq. (w/o enclosure)

Donald S. Bronstein, Esq. (w/o enclosure)

Mr. Joseph 11. White, III (w/o enclosure)

Walter W. Cohen, Esq. (w/o enclosure)

Robert J. Sugarman, Esq. (w/o enclosure)

Rodney D. Johnson (w/o enclosure)

Atomic Safety and Licensing Appeal Board (w/o enclosure)

Atomic Safety and Licensing Board Panel (w/o enclosure)

Docket and Service Section (w/o enclosure) l l

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!D esel generator auxi11ary systems piping and components are

! c..assified in the TSAR text and Table 3.2.1 as conforming to ASM* _ _

Section III Class 3, ANSI B31.1, or manufacturer's standard. It t is not entirely clear where the respective classifications begin or end. In any event, this is not acceptable. We require the

• entire diesel generator auxiliary systems to be designed to ASME Section III Class 3, or Quality Group C, in accordance with

! Regulatory Guide 1.26. Revise your TSAR accordingly. Also, -

provide the industry standards that were used in the design, ~ -

j manufacture, and inspection of the diesel engine mounted piping ,

~*

and components. Revise the appropriate P& ids to show where [

quality group changes occur.  !

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LGS FSAR

1. (; OUEST10N 430.75 (Sections 3.2, 9.5.4, 9.5.5, 9.5.6, 9.5.7,

, 9.5.8)

Dj esel generator auxiliary systems piping and components are cJassified in the FSAR text and Table 3.2.1 as conforming to ASME Section III Class 3, ANSI B31.1, or manufacturer's standard. It is not entirely clear where.the respective classifications begin or end. In any event, this is not acceptable. We require the entire diesel generator auxiliary systems to be designed to ASME Section III Class 3, or Quality Group C, in accordance with Regulatory Guide 1.26. Revise your FSAR accordingly.

Also, -

provide the industry standards that were used in the design, manufacture, and components. and inspection of the diesel engine mounted piping Revise the a quality group changes occur. ppropriate P& ids to show where

RESPONSE

F The diesel generator auxiliary systems are the following: l

a. Fuel oil system (Figure 9.5-8) l

.- b. Cooling water system which includes the jacket water

(; cooling loop and the air cooler coolant loop (Figure 9.5-9) j

c. Starting system (Figure 9.5-10)

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d. Lubrication system (Figure 9.5-11) l

, e. Combustion air intake and exhaust system (Figure 9.5-12) l Piping and equipment ~~in these systems is provided in accordance with ASME Section III Class 3, ANSI B31.1, and manufacturer's

'3standards

. ,2 e, asJindicated W 9. 2.2.on. d. the above referenced figures #addFTable [

l All piping and equipment has been designed to withstand seismic accelerations and operating loads, regardless of design code. .

l

' The manufacturer has developed a highly reliable engine piping system over the 44 years that the design of this basic engine has been in use. .

The design code used for each piping seismic segment or component i

meets or exceeds the commitment made in the Limerick PSAR, Appendix A_and Figure _ A.11 y

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ASME III Supplementa'ryd ' ,.

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ANSI D21.1 Requirements -

Class 3 -

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Requires ASME Requires materials AS$ materialt'were [

materials and that conform to procured and CMTRs .

certified.., either ASME or were supplied ' '

material test ASTM specification 3 reports (CMTR) s for all piping ' _'

larger than m 3/4 inch nomi ,_q nal pipe size..-- - ,

Certificates '

of compliance' s-may be substi- '

Y tuted for CMTRs S' for' piping less '

s ' '

. 4 that 3/4 inch.

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Req 5i$essais- pequ' ires des 14n PipincjNs designed for pressure,'t 'to seismic Category .

mic design'in s addition to temperature, and I with minimum wall .

the B31.1 and normal opera- thicknesses in con

• requirements ting loads. formance with e ASME III, Class 3.

Requires lig- {feqyires only All pipe welds

• uid penetrant, visual inspection greater than magnetic retti- of welds at the 2 incheG are cle, or radio-design pressure radiographed.

w graphic exami- and temperature nation for of the auxiliary circumferen- systems. J s

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tial welds .

greater than 2 inches nomi nal pipe size.

1 Requires initial All piping is Requires pneu- '

matic testing service leak test pneumatically , _

tested to 1.25 x as 1.25 x de- desiQn pressure.

sign pressure >_  ;-

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The on-skid piping and components in-the diesel-generator auxiliary systems were provided in accordance with ASME Section III Class 3 or X manufacturer's standards, as shown in Figures 9.5-8 through 9.5-12.

Auxiliary system components were supplied to ASME III[3 to the greatest t- exten$' practicable at the time of procurement. The referenced figures indicate that this encompasses most of the equipment within the main process loop of each skid-mounted auxiliary system.

f i

l All skid-mounted components, regardless of design code', have been designed to withstand seismic accelerations (Seismic Category I) as well as normal diesel operating loads. Each assembled diesel-generator skid was subjected to a series of operating tests including load acceptance and rejection, air start capacity, variable load, overspeed, 300 hr.

M , normal operating, and contract acceptance tests. In addition to the operating tests, specific component tests milis, were condue' ed 06 Mi<did OW-

1. Fuel Oil Injectors - These were functionally tested and calibrated to deliver a metered amount of fuel to the combustion chamber. Each injector has a unique serial number which permits trahbility 4e % shop test and calibration records. '

2. Flexible Hose Assemblies and Pipe Coupling Connectors -

These components (located as shown in Figures 9.5-8 through Yaev skL 02.

9.5-12)g manufacturchinique design faguiremtiab t.chich art,ustd ko htsovt flexibility in the piping systems)and are not supplied

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toASMEIII[3. Ilowever, these components were fabricated in accordance with engineering specifications and each component was hydrotested to a pure. gran%r b 125 t;mes design pressure.

3. ASMEIII[3andNon-ASMEIII[3 Piping-Allpipingsystems

[ardlessofdesigncode were hydrostatically tested to 1.5 times the design pressure . These tests are documented in the shop test records, All diesel components were supplied or manufactured in accordance with the s.ngpite/s ~ quality control standardsee,ivdicaked belous'

1. SubsuppliedComponents-Designandprocurementcontrolswere l

l '

l used in the procurement of all subsupplied components. These components were purchased to detailed engineering specifications and drawings. Upon receipt, all components (or a representative sample) were inspected against the specification, drawings and purchase order requirements, and affixed with appropriate tags to be removed at the point ek ute M %4 manufacturing cycle. Periodicreviewsof wego emluc$ed subsupplier performance and audits of vendor records to ensure that the quality of the items provided remained acceptable.

Typical examples of subsupplied items procured under this program 4.cluda .

a) Air start solenoid valves, filters,91strainers *,

and compressors

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b) Inlet and exhaust expansion joints and the exhaust silencer c) Motor driven fuel oil, jacket water, and lube oil pumps 1

d) Combustion air caolers, lube oil and jacket water standby heaters 4t-e) Fuel and lube oil strainers f) Jacket water, air cooler coolant, and lube oil thermostatic bypass valves I l

l g) Electrical and pneumatic instrumentation and controls. l

2. Supplier-Manufactured Components - Equipment and components designed and manufactured by the diesel-generator suppthr were designed in accordance with WriBae daMy Cc%kve\ proc.adw

.amunnen which required appropriate reviews and approvals of all detail drawings, specifications, procedures and instructions.

During the manufacturing process, visual inspection, dimensional l

checks, final inspections, and customer hold and witness points were utilized. Procedures wereDeveioped and ukhut for rejectO a A ponents, recall of materials, and internal audits.ETypical examples of supplier-manufactured components I

incorporating the above . standards include the following:

~

DRAET a) Air admission check valves, pilot valves, and air start distributort b) Engine-mounted intake and exhaust air piping, scavenger air receivers,gevacuation system components c) Fuel injectors, dirty fuel drip tank, fuel and oil drip pan d) Governor control linkage.

The above standards are fully documented in the diesel-generator suppliers' Quality Assurance Plan which addresses the eighteen criteria l contained within 10CFR50, Appendix B. It is uwl $or all diesel l

generators supplied by this manufacturer for use in nuclear plants, 1

i-and has received the approval of the appropriate operating utilities and the NRC.

obeve The conhras desc.nbd gwere usaml Soc. all piping and components supW.d A dim genwoAcv wa 4tlunw. b a&&lMm, assuuss the applicant invoked supplemental quality M requirements on the following diesel-generator and auxiliary system components:

1 Subsupplier Items:

Generators, generator controls, and static exciters Starting air receivers and inlet valves

- .Iacket water, lube oil and air cooler coolant heat exchangers

E' .

-e-DRAET Lube oil strainers and filters Governors Inlet air filters Turbochargers Fuel oil day tank i Lube oil storage tank Jacket water expansion tank.

2. Diesel-Generator Supplier 4fanufactured Items 1 Engine blocks Sukaseoilpan Cylinder liners Exhaust belts Pistons and piston inserts Crankshafts and connecting-rods Vertical drive assembly wd Scavenging air blower gears, housings mpellers Engine-driven lube oil, jacket water and air cooler coolant pumps Jacket liners Skid-mounted piping and valves provided to AS>lE III/ 3.

The additional quality assurance requirements invoked by the applicant include: (1) periodic documented subsupplier audits (including plant visits); (2) review and approval of subsupplier QA programs and manuals)

(3) test and inspection audits; (4) calibration of test gauges before and after use; and (5) control of calibration records and acceptance devices.

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h'ith the(above design, manufacturing and testing control $,e + .

E'" 'o the on-skid and off-skid piping and components e,e equivalent to Quality Group C. ko*e heew Mg

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DRAFT

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.. Describe your design provisions made to protect the fuel oil

! storage tank fill and vent lines from damage by tornado missiles.

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c ~OUESTION (Srcticn 430.729.5.4) DRA"FT Describe your design provisions made to protect the fuel oil storage tank fill and vent lines fror, damage by tornado missiles.

RESPONSE

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The 1 and vent lines have a minimum extension above ground The ven ne for each tank is backed up by a separate m l relief valve e, making the probability of lo oth lines very low. Altern aths of filling /ve e.g., manhole of tank) are available fo e in th ely event of damage by tornado missiles. Cross co tons are also'provided in the ach diesel to allow any fuel oil supply and n lines diesel to be s ed from any storage (Figure 9.5-8).

Credib) nado missile damage to the fill r a vent line I

not affect the safe shutdown of the plant.

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},Consideradesignb.asisseismiceventcoincidentwithlossof _

yoffsite power and failure of all non-seismic llequipment/ components. Under these conditions, discuss how

' minimum lighting levels will be maintained in.the control room ,

until such time as the emergency diesel generators have come on line and emergency ac lighting has been restored. Using these same conditions, state whether lighting would be required in any

/

iother part of the plant for the time interval between loss of foffsite power and availability of onsite power.

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3 s gi g:?: g OUESTION 430.68 (Section 9.5.3)

Consider a design b. asis seismic event coincident with loss of offsite power and failure of all non-seismic equipment / components. Under these conditions, discuss how minimum lighting levels will be maintained in the control room until such time as the emergency diesel generators have come on line and emergency ac lighting has been restored. Using these same conditions, state whether lighting would be required in any other part of the plant for the time interval between loss of

. offsite power and availability of onsite power.

RESPONSE

During a design basis seismic event coincident with loss of offsite power and failure of{th: non : icei de preer ceurce, the cc:ntr:1 :::: :nd ;ener:1 :r- p?:Et lighting r!!! be rect: red vi:

"O Opereter actier

-theerer;enryecli;htin;[l_hir??recendr.

i: re;. ired durin; thic t e period for th: ::f: Chutd un of th; pl:nt. nder this

100:

postpted scen rie, all areas of the plant 1i;htin; fer ih10 chert ti=0 peried;

-wi!! :::periene teurver, n 0; crater 7. tier in required ir :ny of the  :::::

-durin; thic tirr e nem-ut-u egmuk/mpmeds, tka. At roe m M J k m e W d a4 ex,h e \0 (et c=h, % h .uxxyymq Ac u.g 96.h hv.M E h Cmb\ Room cwt, vismi. cal mm%d %d A.e-eri > mcusw.muu..A m,q w u

%&u Yf.4., M) bv bM Reevw. Ud4 k reuhd. k o. Si.Wc h 1 SWM a~J. M h-.MMca-%suppevtad.

430.68-1 Rev. 13, 11/82

% e.s. m . r. LGS FSAR u

b. Emnroency de Lichtino DRAFT (

Emergency de lightir.g consists of a combination of ac-dc lighting fixtures r.ormally supplied from the Class IE buses. Upon loss of the Class 1E ac source, an automatic transfer switch transfers this lighting immediately to the 125V de non-Class 1E station battery source. The 125V de non-Class 1E station battery source ,

will provide power to the emergency ac-dc lighting system for one hour .All emergency ac-dc lighting fixtures are incan scent type.

Q3ngggg& Emergency lighting in remote structures and areas where U the above de source is not available consists of battery-powered self-contained units.

Emergency de lighting fixtures and illuminated exit signs are located in the control room, stairways, and along exit routes from each floor throughout the plant.

Table 9.5-12 identifies the illumination intensities for the vital and hazardous areas where emergency lighting is provided for normal plant operation and and the evacuation of personnel in the event of an accident. The table provides both the normal and emergency operating conditions for these areas. These illumination levels conform to the IES Lighting Handbook recommended levels. Column 4 of Table 9.5-12 shows the 125V de power-supplied lighting illumination intensity levels that are maintained in the control room and other areas of the plant between loss of offsite power and availability of onsite power.

Table 9.5-13 identifies the areas where remote actions are re' quired to safely shutdown the plant in the event of a control room fire, auxiliary equipment room fire, or a failure of the remote shutdown system. The lighting levels provided at these locations is shown.

The emergency ac/dc lighting system provides approximately 10 to 20 percent of the total lighting of the plant. The percentage of t emergency lighting fed from each division of Class 1E power is as follows:

a. Division 1 = 6%

b. Division 2 = 32% '

c. Division 3 = 12%

d. Division 4 = 50%

The emergency lighting load is not divided equally among the four diesel generators due to plant utilization. Emergency lighting, both ac and de, has been provided for all areas shown in Table < .

(

9.5-13. In these areas, the loss of the diesel generator would Rev. 19, 04/83 9.5-26 1

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LGS FSAR TABLE 9.5-12 ',

LIGHTING SYSTEM .-

INTENSITIES OF ILLUMINATION l i

j Normal Maintained l BneLuency Lighting - Foot Candles l l Foot Candles i AC Supplied l DC Supplied l i

QCATION(1) 3 1 1 1 1 l 30 10 Silhouette l l ment (PGCC) Room l l l 1 1 1 1 I l i I i i 1

om El. 269'-0a j 100 l 20 l 3 l I -1 I I j

1.

(circulating Water j 20 l Silhouette j l '

! I I I I l

1 1 1 'l Room El. 2548-0a j 30 l 10 l Silhouette 1 1 1 30 j 10 l 3 i l Room El. 239'-0" l ,

l l '

Room El. 289 l 30 l 10 l .:fEMneme44e-3 l l t I i I .

1 1 j Area El. 217'-0a  ;

30 l Silhouette j l 1  ; l m I trol Room to Emerg. l As indicated by l l l

. j applicable areas j j l l

! j below l 5 l Silhouette j i

l i I I

trol Room to Reactor' j As indicated by .j j .[ .

l applicable areas l l l below ,

l re j refueling floor -30 l l l -

operating areas -20 l l l

non-operating -10 l Silhouette l l .

331'-0" l areas j j j -

1 I L I "rd

'r Enclosure { l l l '

0" ,

30 l 10 ,

3 l i 1 I ng Floor 30 j Silhouette l d I 1 6: ,,,, l

DRAFT dh NM,Mi -

l

~

The diesel engine exhaust' piping shown'on Figure 1.2-36 is not in

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concurrence with the description in Section 9.5.8. Figure 1.2-36 shows a 45 degree fitting at the end exhaust piping, while the text discusses an elbow at the same location. Revise your FSAR to resolve this inconsistency. Also, expand your FSAR discussion to show how the presence of water, dust, ice, or snow in the exhaust system would be detected and what provisions will be made for removal of same. _ , , , ,

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