ML20072N181
| ML20072N181 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 03/29/1983 |
| From: | Bradley E PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8304010466 | |
| Download: ML20072N181 (14) | |
Text
e PHILADELPHIA ELECTRIC COMPANY 2301 M ARKET STREET P.O. BOX 8699 PHILADELPHI A. PA.19101 EDW A R D G. B AU ER, J R.
anoorma akcounssk EUG EN E J. B R ADLEY associate esmana6 coussu6 March 29,1983 y
DON ALD BLANKEN RUDOLPH A. CHILLEMI
.j E. C. KIR K H A LL
,)
Y. H. M AHER CORNELL p
]
PAUL AUERB ACH
]
AssesTaMT GENER AL counsel EDW A RD J. CULLEN. J R.
THOM AS H. MILLER. J R.
BREN E A. Mc K EN N A AssesTANT CouNsEb Mr. A. Schwencer, Chief Licensing Branch No. 2 Divison of Licensing U. S. Nuclear Pegulatory Ccmnission Washington, DC 20555
Subject:
Limerick Generating Station, Units 1 and 2 Fequest for Information frcxn the Power Systes Branch
Reference:
Meeting with the Pcer Systen Branch Reviewe.r, E. Tcxnlinson, and Philadelphia Electric Company on March 9-10, 1983
Dear Mr. Schwencer:
The attached documents are revisions to draft figure 9.5-10 and the draft response to question 430.99, mailed to you on March 24, 1983, and additional draft question response changes and draft text changes to the FSAR resulting frcm the discussion with Mr. E. Tcmlinson at the referenced meeting. Please note that ccmplete changes to the response to question 430.75 are not provided at this time and will be made l
available at the end of April, 1983.
These changes will be formally incorporated into the FSAR revision scheduled for April, 1983.
Sincerely, 9304010466 830329 g
_e PDR ADOCK 05000352 0 gl A
pyg 9
IN/gra/r-20 cc: See Attached Service List
cc: Judge Iawrence Brenner (w/o enclosure)
Judge Richard F. Cole (w/o enclosure)
Judge Peter A. Fbrris (w/o enclosure)
Troy B. Conner, Jr., Esq.
(w/o enclosure)
Ann P. Hodgdon (w/o enclosure)
Mr. Frank R. Panano (w/o enclosure)
Mr. Robert L. Anthony (w/o enclosure)
Mr. Marvin I. Irwis (w/o enclosure)
Judith A. Dorsey, Esq.
(w/o enclosure)
Charles W. Elliott, Esq.
(w/o enclosure)
Mr. Alan J. Nogee (w/o enclosure)
Robert W. Adler, Esq.
(w/o enclosure)
Mr. Thmas Gerusky (w/o enclosure)
Director, Pennsylvania Emergency Managanent Agency (w/o enclosure)
Mr. Steven P. Hershey (w/o enclosure)
James M. Neill, Esq.
(w/o enclosure)
Donald S. Bronstein, Esq.
(w/o enclosure)
Mr. Joseph H. Vhite, III (w/o enclosure)
Walter W. Cohen, Esq.
(w/o enclosure)
Ibbert J. Sugannan, Esq.
(w/o enclosure)
Rodney D. Johnson (w/o enclosure)
Atcmic Safety and Licensing Appeal Board (w/o enclosure)
Atomic Safety and Licensing Board Panel (w/o enclosure)
Docket and Service Section (w/o enclosure)
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LGS FSAR QUESTION 430.97 (Section 9.5.6)
Revise Figure 9.5-10 to show the air dryers as well as the engine mounted air start system piping and components discussed in FSAR Also, show all instrumentation, controls, Section 9.5.6.2.
sensors and alarms associated with the system and discussed in the FSAR.
RESPONSE
Figure 9.5-10 has been changed to show all air start system Further discussion of the air starting piping and components.
system is previded in the response to Question 430.96.
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430.97-1 Rev. 17, 02/83
+
LGS FSAR OUESTION 430.99 (Section 9.5.6)
Expand your description of the diesel engine starting system.
The FSAR text should brovide a detailed system description of what is shown on Figures 9.5-8 and 9.5-10.
The FSAR text should also describe
- 1) components and their function, 2) instrumentation, controls, sensors and alarms, and 3) a diesel engine starting sequence.
In describing engine starting sequence include the number of air start valves used and whether one or both air start systems are used.
RESPONSE
4 0
Sections 9.5.6.2 and 9.5.6.3 have been changed to describe the diesel engine starting sequence in additional. detail.
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An unsuccessful engine crank cycle is measured by the cranking time control relay which aborts the start attempt if 200 rpm is not reached within 7 seconds following the start signal.
The system is designed for manual operation in the event of automatic starting air solenoid valve failure.
l8LS W To prevent formation of rust particles in the starting system,
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none of the piping,,
filters or air receiver = =*e constructed of carbon steel.d(Any entrained solid particles or liquid droplets are prevented from reaching critical system 74 $ 9 components by air strainers and filters.
Drain connections are provided on the air receiver for draining off any collected NJ%ats condensate.
The air start valves are not susceptible to valve sticking due to the presence of any foreign particles by virture 1
of their design and construction.
l 9.5.E.3 Safety Evaluation
' Safety-related components (including supporting structures) of the diesel generator starting system are designed to seismic i
Category I requirements,as defined in Section 3.7.
The system is located in the diesel generator enclosure that is designed to seismic Category I requirements as discussed in Section 3.8.
llh The diesel generator starting system i's designed so that failure of any one active component does not result in the loss oi starting air to any diesel generator.
Therefore, failure of any y
one component of the diesel generator starting air system does not preclude safe shutdown of the plant following a LOCA and/or logs of offsite power.
See Table 9.5-8 for a failure mode and effects analysis of the system.
Each diesel generator unit is protected against the effects of natural phenomena such as tornadoes, hurricanes, and floods.
Evaluation of the diesel generator starting system with respect l
to the following areas is discussed in" separate FSAR sections as indicated:
a.
Protection against wind and tornado effects 3.3 t.
Flood design 3.4 i
c.
Missile protection 3.5 Rev. 17, 02/93 9.5-46
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System Description
Each diesel generator is equipped with two independent air starting systems.
Each consists of a reciprocating air compressor, one air receiver, line filters, and associated piping and valves.
Each compressor is driven by a 20 hp motor connected to a 440V non-Class 1E ac power supply.
The starting system is shown in Figure 9.5-10, and major component design parameters are listed in Table 9.5-7.
The diesel generator general arrangement is shown in Figures 1.2-35 and 1.2-36.
In automatic operation, each of the motor-driven air compressors is centrolled by a pressure switch to maintain the pressure in the air receivers between 225 and 250 psig.
The comprecsors may be run manually.
The mir compressors are sized such that each compressor can fully charge its air receiver in no more than 30 ainutes.
Each air receiver was tested and provides at leart five stacts (in undar ten seconds) of the diesel engine when fully phargad.
Each air receiver is provided with relief, drainj check, and shutoff valves to permit any receiver to be removed from service, repaired, and placed back in service, without
. affecting the air. compressor or the other air receiver.
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Each air start train consists of one solenoid operated air i
start pilot valve, one solenoid operated air vent, valve, and one air start velve which admits the starting air to the$ air distributors ttnd s y m,4 me w L.
WSW he<Aen tosen Asse
. The diesel engine start sequence is as follows:
p,,4 A start signal energizes both'the start relay and the cranking time control relay.
The start relay energization will close and vent the air start solenoid valves on both trains.
This causes the air start valves to admit air to the l
air distributors and thence to th.e proper cylinders, which l
causes the engine to start rotating.
Simultaneously, the air l
air between the air start valves and the distributors.
vent solenoid valves willime closed to prevent the loss of Normally at this point, the engine fires and the engine speed increases past 200 rpm (Iow speed relay), which de-energizes the start and cranking time relays, and 600 rpm (high speed t
l relay) which energizes the alarm delay relay and the temperature control air solenoid valve.
After approximately 7 seconds, the engine is up to operating speed and all i
pressures are up to operating values, and no alarm or shutdown will occur.
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f"5'8 NOTES 4..
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l 1.
LINES SHOWN THUS +* ' +-ARE DESIGNED TO ASME Ill m'85 CLASS-3 REQt:lREMENTS.
- 2. NON-ASME LINES ARE DESIGNED TO M ANUF ACTURER'S P
ST AND ARDS.
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RELIEF VALbES (PSV) SHOWN ARE ASME Vill.
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EQUIPMENT AND COMPONENTS ARE DESIGNED TO I
M AN UF ACTU lE R'S ST AND ARDS k'
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UNITS 1 AND 2 g
FIN AL SAFETY AN ALYSIS REPORT v nw L
DIESEL GENERATOR STARTING SYSTEM F IGURE 9.510 R EyA ?.-N /83
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