ML19221B073
| ML19221B073 | |
| Person / Time | |
|---|---|
| Issue date: | 03/31/1979 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| References | |
| NUREG-75-087, NUREG-75-087-09.5.7, NUREG-75-87, NUREG-75-87-9.5.7, SRP-09.05.07, SRP-9.05.07, NUDOCS 7907120355 | |
| Download: ML19221B073 (7) | |
Text
N U R E G-75/087 fpa arcg%
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U.S. NUCLEAR REGULATORY COMMISSION
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OFFICE OF NUCLEAR REACTOR REGULATION SECTION 9.5.7 EMERGENCY DIESEL ENGINE LUERICATICN SYSTE M REVIEW RESPONSIBILITIES Primary - Power Systems Branch (PSB) l Secondary - Mechanical Engineering Branch (MEB)
Structural Engineering Branch (SEB)
Materials Engineering Branch (MTEB)
Auxiliary Systems Branch (ASC)
I.
AREAS OF REVIFW Th? emergency diesel engire lubrication system M DELS) provides essential lubricatiun to the components of the emergency diesel engines. The PSB reviews the ECELS and associated auxiliary systems to assure conformance with the requirements of GCC 2, 4 and 5.
The review includes system piping, pumps, components, and associated ancillary equipment essential for system operation up to the engine housing.
1.
The PSB reviews the characteristics of the ECELS and system components with l
respect to the effect cn fLnctional perform; ce of adverse environmental occurrences, abnormal Opciaiivndi requi r'eneer.t s, and atC l ut it Lund i t i urf s.
2.
The P5B determines that a malfunction or failure of a component, or the loss of l
a cooling source does not reduce the safety-related functional performance capabilities of the energency powered systems. Further, the DSB review assures l
that:
a.
System components and piping have sufficient physical separation or barriers to protect the system from internally and externally generated missiles.
b.
The system is protected from the effects of pipe cracks or breaks in high and moderate energy piping.
c System components are designed in accordance with the design codes cequired by the assigned quality group and seismic category classifications.
d.
The system is housed in structures designed to seismic Category I require-ments.
e.
Failure of non-seismic Category I structures or components will not affect the safety-related functions of the system.
USNRC STANDARD REVIEW PLAN Stande,d review pi.no e,e,re,e..d to, to. gu.denc..f i.e. o+1 c.
f Nuci.or R.eetor R eguiet. n et off rose.ne bee for the rew.ew of opphceisono to construct and 06.*'ete nucseet power p4 ente These documen's are made evealable to the public as part of the Commase.on e ponc y to enform the nuclear 6adustry and the generet publ6c of regutetery procedures and poteceen Standard review paeno are not oubetetvies f or coguistory guedee or the Comminom o reguietoone end compliance wfth them te not required The of endard reweew pten sectione are hoved to Revie.on 2 of the Standeed Formet end Content of Saf ety Ane*yses Reporte foe Nurnese Power Piante Not eH sectione of the Stenderd Formet have e correspondeng reweew plan Puedes*ed etenderd rew*ew p4ene anal be eewined portodicesty. es appropeaste. to e<
ommodate commente end to reflect new inf ormeteon end ooperience g
Commente and suggeottone for emprovement wiel be consideeed and should be sent to the U $ Noctose Reguietary Com a Office of Nuclear Reectof Regunstion. WWoohengton D C 20hh6 nnD d
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Rev. 1 149 04B.
3.
The PSB will also review the design of the EDELS with respect to the following:
l a.
Functional capability during abnormally high site water levels (probable maximum flood).
b.
Capability for detection and control of system leakage.
c.
Measures to assure the quality of the lubricating oil.
d.
Capability for isolating portions of the system in the event if excessive leakage or component malfunction.
e.
Instrumentation and control features provided to permit operational testing of the system and to assure that normal protective interlocks do not preclude engine operation during emergency condit' ens.
4.
The PSB will determine the adequacy of tr.e design, installation, inspection and testing of all electrical components (sensing, control, and power) required for proper operation of the system, including interlocks.
5.
The PSB will review the applicant's proposed technical specifications for operating l
liranse applications as they relate to areas covered in this SRP Section.
Sernndary reviews will be performed by other branches and the results of their reviews will be used by the PSB to complete the overali evaluation of the system. The secondary l
reviews are as follows. The SEB will determine the accepta"ility of the design analyses, procedures, and criteria used to estabiish the ability of seismic Category I structures housing the system and supporting systems to withstand the effects of natural phenomena such as the safe shutdown earthquake (SSE), the probable maximum flood (FMF), and tornado missiles. The MEB will review the seismic qualification testing of components and will determine that the corrponents, piping, and structures are designed in accordance with applicable codes and standards. The ASB will determine l
that the seismic and quality group classifications for system components are acceptable.
The ASB also determines that the EDELS is in accordance with Branch Technical Position ASB 3-1 and MEB 3-1 for breaks in high energy and cracks in moderate energy piping systems outside containment. The MTEB wiil verify that inservice inspection require-ments are met for system components and, upon request, will verify the compatibility of the materials of construction with service conditions.
II.
ACCEPTANCE CRITERIA Acceptability of the emergency diesel engine lubrication system, as described in the applicant's safety analysis report (5AR), is based on specific general design criteria and regulatory guides. The reviewer will also utilize information obtained from other sources such as other federal agencies, published reports, industry standards, military specifications, and technical literature on commercially available products.
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An additional basis for the acceptability of the system will be the degree of similarity with systems in previously reviewed plants with satisfactory operating experience.
The design of the EDELS is acceptable if the integrated design of the system is in accordance with the following criteria; 1.
General Desig.i Criterion 2, as related to structures housing the system and the system itself being capable of withstanding the effects of natural phenomena such as earthquakes, tornadoes, harricanes, and floods, as established in Chapters 2 and 3 of the SAR.
2.
General Design Criterion 4, with respect to structures housing the system and the system itself being capable of withstanding the effects of external missiles and interi. ally generated missiles, pipe whip, and jet impingenent forces associated with pipe breaks.
3 General Design Crite-ion 5, as related to shared systems and components irrportant to safety being capable of performing required safety functions.
4 Regulatory Guide 1.26, as related to quality group classification of the system components.
5.
Regulatory Guide 1.29, as related to the seismic design classification of system components.
6.
Regulatory Guide 1.68, as related to preoperational and startup testing of the diesel engine lubrication oil system.
7.
Regulatory Guide 1.102, as related to the protection of structures, systems and j
components important to safety from the effects of flooding.
l 8.
Regulatory Guide 1.117, as related to the protection of structures, systems and components irportant to safety from the effects of tornado missiles.
9.
Branch Technical Positions ASB 3-1 and MEB 3-1, as related to breaks in high and l
moderate energy pipir,g outside containment.
10.
Specific design criteria as follows:
The operating pressure, temperature differentials, flow rate, and heat a.
removal rate of the system external to the engine are in accordance with recommendatiors of the engine manufacturer.
b.
The system has been provided with sufficient protective measures to maintain the required quality of the oil during engine operation.
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c.
Protective measures (such as relief ports) have been taken to prevent unacceptable crankcase explosions and to mitigate the consequences of such an event.
d.
The temperature cf the lubricating oil is automatically maintained above a minimum value by means of an independent recirculation loop including its own pump and heater, to enhance the "f;rst try" starting reliability of the engine in the standby condition.
11.
Branch Technical Position ASG 9.5-1, as related tn lube oil system fire protection.
12.
Branch Technical Position ICSB-17 (PSB), as it relates to diesel engine lubrication system protective interlocks during accident conditions.
For those areas of review identified in Subsection I of this SRP section as being the responsibility of other branches, the acce;tarce criteria and their methods of application are ccntained in the SPP secticns cerres pondir g to those branches 111 REVIEW FRCCEDURES The procedures below are used during the ctnstruction permit (CP) review to determine that the design criteria and bases and the preliminary design as set forth in the preliminiry safety an 31jsis report meet the acceptance criteria gi'.er. in subsec'. ion II.
For tre review of operating license (CL) application 3, the procedures are utilized to verif y that the initial des gn criteria and bases hne been apprcpriately i
implemonted in the final design as set forth in the final saf ety an 31ysis report.
The Ot review includes a determination that the content and intert of the technical specifications prepared by tne applicant are in agreeTont with the requirements for system testing, minimum erfornance, and surveillance dewoloped as a result of tk p
staff's review.
Upon request from the primary reviewer, tho secondary review branches will provide input for the areas of review stated in Sutsection I.
The primary revieoer obtains and uses such input as required to assure that this revie, procedure is craplete.
The revie er will select and empnasize ute rial from this SRP section as may be appropriate for a particular case.
1.
The SAR is reviewed to establish that the EDELS de cription and related diagrams clearly delineate system operation, ir.ciuding the means provided for indicating and ronitoring oil lesels, temperatures, and pressures required for continuous operation of the system.
The revie er verifies the following:
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a.
Failure of a piping interconnecticn, as shown on the system piping and instrumentation diagrams (P&lDs) between subsystems will not cause total degradation of the lobe oil system function.
The results of tailure nodes and effects analyses will be used in this determination.
t).
The system layout drawings are examined to ascertain that sufficient spae has t'een providad to permit inspection of components.
c.
The system has bnn designed to preclude the entry of deleterious material into the system due to operator errt>r or extreme natural phenorena during recharging or normal operation. The system is acceptable if it is shown in the SAR that the system is locked closed, or if entrv is administrati.ely contrulled.
d.
The design contains an independent c irculation loop to maintain the tempera-ture of the crank ise oil above e minimum value during the standby modo.
e.
The system P&l0s indicate tN temperature, pressure, and level sensors which alert the onerator when the;e parreters exceed the ranges recorrended by the engine manufacturer.
f.
Essential portions of the EDELS are classified seismic C3tegory I.
9 2
The reviewer determines t. hat the system is designed to maintain function under adverse environmental phenomena.
The reviewer, using engineering judgment and the results of f ailures modes and ef fects analyses, determines that:
a.
The failure of systems not desigred to seismic Category I requirements or of non seismic Category I structt.res that house, support, or are close to
.he (C!t5, will not preclude f unc ticring of the system. Chapters 2 and 3 of the 5M describe related site f eatur es and pros ide the general structural arrangement and layout drawings and a tabulation of seismic desiqq classifi-cations for the struc'ures and systems. Statements in the SAR to the etfect that the above design requirements are met are acceptable.
b.
The essential portions of the system are protected from the etfects of floods, hurricanes, torn 3does, ard internally and externally generated missiles.
3.
fhe review verifies that the EDEL5 is protected from the effects of breaks in high and moderate energy tires The system description in the SAR is reviewed to verify that there are no high or mcderate energy piping systems close to the lobe oil system, cr that protection from effects of failure will be provided.
The means of providing such p otection are given in Chapter 3 of the SAR and
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procedures to review the information presented are given in the corresponding SRP sections.
4.
The descriptive information, P& ids, related system drawings, and tystem analyses in the SAR are reviewed to assure that essential portions of the system will function following design basis accidents, assuming a concurrent single active component failure. The reviewer evaluates the results of failure modes and effects analyses presented in the SAR to assure functioning of required components, traces the availability of these compunents on system drawings, and checks that ninimum system require:aents are met for each degraded situation over required time spans.
For each case, the jesign is acceptable if minimum system requirements are met.
IV.
E 'ALUATION FINDINGS Th e reviewer veri f ic ', that suf ficient information has been provided and his review su ) ports conclusions of the following type, to be included in the staff's safety es alunion report:
"The emergency di'sel engine lubrication system includes the pumps, heat exchangers, valves, piping, makeup piping, and the points of connection or interfaces with other syst w s.
The scope of review of the emergency diesel engine lubrica'icn system 'or the plant included layout drawings, flow diagrams, r ' ping and instrumentation diagrams, and descriptive information for the system and supporting systems that are essential to its operation. [The review has dotermined the adequacy of the applicant's proposed design criteria and bases for the emergency die el engine lubrication system and the requirements for system performance under all conditions of plant operation. (CP)] [The review has determined that the design of the emergercy diesel engine lubrication system and auxiliary supporting systems is in conformance with tne design criteria and bases.
(OL)]
"Ihe basis for acceptance in the staff review has been conformance of the applicant's designs and design criteria for the emergency diesel engine lubrication system and necessary supporting systems to the Commi>sion's regulations at set forth in the general design criteria, and to applicable regulatory guides, staff technical positions, and industry standards.
"The staff concludes that the design of the emergency diesel engine lubrication system conf orms to all applicable r egulations, guides, staf f positions, and industry standards, and is acceptable."
V.
REFERENCES 1.
10 CFR Part 50, Appendix A, General Design Criterion 2, " Design Bases for Protection Against Natural Phenomena."
O hv. 1 9.5.7-L Cp-D 14.)
2.
10 CF R Part 50, Appendix A, General Design Criterion 4, " Environmental and Missile Design Bases."
3.
10 CF R Part 50, Appendix A, General Design Criterion 5, " Sharing of Structures, Systems, and Ccmpenents."
4.
Regulatory Guide 1.26, " Quality Group Classifications ano Standards For Water, Steam, and Radioactive-Was".e-Containing Components of Nuclear Power Plaats."
5.
Regulatory Guide 1.29, " Seismic Design Classification."
6.
Regulatory Guide 1.63, " Initial iest Programs for Water Cooled Reactor Power Plants."
7.
Regula*ory Guidc 1.102, "Flocd Protection f or Nuclear Power Plants. '
8.
Regulatory Guide 1 ' i f, " Tornado Design Classification."
9.
Branch Technical Positions ASB 3-1, " Protection Against Postulated Piping Failures in Fluid Systems Outside Containment," attached to the SRP Section 3.6.1, and MEB 3-1, " Postulated Break and Leakage Locations in Fluid System Piping Outside Containment," attached to SRP Section 3.6.2.
10.
Branch Technical Position ASB 9.5-1, " Guidelines f or fire Protection for Nuclear Power Stations" (attached to SRP 9.5-1).
11.
Branch Technical Posi tion ICSB-17 (PSB), " Diesel-Generator Protective Trip Circuit Bypasses," attached to 3RP section Appendix 8A.
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