ML19221B074
| ML19221B074 | |
| Person / Time | |
|---|---|
| Issue date: | 03/31/1979 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| References | |
| NUREG-75-087, NUREG-75-087-09.5.8, NUREG-75-87, NUREG-75-87-9.5.8, SRP-09.05.08, SRP-9.05.08, NUDOCS 7907120356 | |
| Download: ML19221B074 (6) | |
Text
NUREG 75/087 a&g>* atog4 g
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fi U.S. NUCLEAR REGULATORY COMMISSION MQ'"#\\.... )
STANDARD REVIEW PLAN OFFICE OF NUCLEAR F.EACTOR REGULATION
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SECTION 3.5.8 EMERGENCY DIESEL ENGINE CGM 3USTICN AIR INTAKE AND EXHAUST SYSTEM REVlf W RESPONSIBILITIES Primary - Power Systems Branch (PSB) l Secondary - Auxilimry Systems Branch ( ASB) l Strur.tural Engineering Branch (SEB)
H?chtnical Engineering Branch (MEB)
Materials t nqineering Branch (MTE C) 1.
JCfA5 GF RE/IfW The emergency diesel engine combustion air inte e and exhaust system (ELECAIES) supplies I
combustion air of reliable quality to the diesel engines, and exhausts the predacts of com-Dustion from the diesel engir,es to the atmosphere.
The PSB reviews the syste', from the l
catside air intase t; the combustion air supply lines connected to the diesel engines, and frcm the exhaust conr ect ions at the diesel engiras to the discharge point outside the building to assure conform.ince with General Design Criteria 2, 4 ar.d 0 l
1.
The h2 reviews the EDECAIES to verify that:
l a.
The system design meats aparepriate seismic design classification requireunts and the components are Jesigned, fabricated, erected, an1 tested to acceptable quality s t a r.da rd s b.
The essential portions of the systen are housed in or or, a seismic Category I structure th at is capable of protecting the system from extreme natural ph;nomena and external missiles.
c.
Each diesel engine has con independent combustion air intake and exhaust system.
d.
The consectenes nf a single active failure in aa engine combustion air intake or exhaust system will not lead to the loss of function of more than ore diesel generator.
2.
The PSB will determine the adequacy of the oesign, installation, inspection ar d testing c : all electrical systems (sensing, control ar.d power) required for proper system operation.
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3.
The applicanL-cropo'.ed technical enacifications are reviewed by PSB for l
operating lic<nse applications, as they relate to areas covered in this SRP section.
Secondary reviews will be performed by other branches ana the results used by the PSB Lo l
complete the overall evaluation of the system. The secondary reviews are as fol.ows.
The SEB will determine the acceptability of the design analyses, procedures, and criteria used to establish the ability of seismic Category I structures housi'g the system and supporting systems to withstand the effects of natural phenomena such as the safe shutdown earthquake (SSE), the probable maximum flood (PMF), and tornado missiles. The MEB will review the seismic qualllD_atirn of camponents and confirm that system components, piping, and struc-tures are des--gnsd in accord 9nce with applicab h codes and standards. The ASB will deter-l mine that tr.e seiwic and quality group classifications for system compenents are acceptable.
The 858 also determines that the EDECAIES is in accordance with Branch Technical Position ASB 3-1 and MEB 3-1 for cracks and breaks in nigh energy and moderate energy piping systems outside containment. The MTEB will verify that inservice inspection require-monts are met for system components and, upon ret,uest, will verify the compatibility of the materials of construction with service conGitions.
II.
ACCEPTANCE rRITERIA Arceptabi'ity of the design of the emerger, diesel generator combustion air intake and exhaust sy stem, as described in *.he applicant's safety anilysis report (SAR), is b8 sed on specific general design criteria and regulatory guides. An additional ba.is for determining the acceptability of the FDECAIES will be the degree of similarity of the design with that l for previously reviewed plants with satisfactery opa ating experience.
The design of the EDECAIES is acceptable if t::e integrated design of the systtm is in l
accordance with the following criteri, 1.
General Design Criterion 2, es related to the ability of stru-tures housing the system and system components to withstand the ef fects of natural phenomena such as earthquakes, tornadoes, narricanes, and floods.
2.
General Design Criterion 4, with respect to structures housing the systems and the system companents being capable of withstanding the efTects of external missiles and internaib generated missiles, pipe whip, and jet impingement forces associeted with pipe breaks.
3.
General Dasign Criterion 5, as related to shared systems and components important to safety being capable of performing required safety
_tions.
4.
Regulatory Guide 1.24, as related to quality group classification of the system components.
9 a,. y, 1 9.5.8-2 qgU
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S.
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 combustion air and exhaust system.
7.
Regulatory Guide 1.102, as related to the protection of structures, systems and components important to safety from the effects of flooding.
~
8.
Regulatory Guide 1.117, as related to the protection of structures, systems and components important to safety from the effects of tornado missiles.
9.
Each emergency diesel engine should be provided with an independent and reliable com-bustion air intake and exhaust system. The system should be sized and physically arranged such that no degradation of engine function will be experienced when the diesel generator set is required to operate continuously at the maximum rated power output.
10.
The combustion air intake system shall be provided with a means of reducing airborne particulate material over the entire time period that emergency power is req ced assuming the maximum airborne particulate concentration at the combustion air intake.
11.
Suitable design precautions have been taken to preclude degradation of the diesel engine power output due to exhaust gases and other dilutents that could reduce the oxygen content below acceptable levels.
12.
Branch Technical Position ASB 3-1 and MEB 3-1, as related to breaks in high and moderate energy piping outside containment.
13.
Branch Technical Position ICSB 17 (PSB), as it relates to diesel engine air intake and exhaust system protective interlocks during accident conditions.
For those areas of review identified in Subsection I of this SPP section as being the responsibility of other branches, the acceptance criteria and their methods of application are contained in the SRP sections corresponding to those branches.
III. REVIEW PROCEDURES The procedures below are used during the construction permit (CP) review to determine that the design criteria and bases and the preliminary design as set forth in the preliminary safety analysis report meet the acceptance criteria given in Subsection II.
For the review of operating license (OL) applications, the procedures are utilized to verify that the initial design criteria and bases have been appropriately implemented in the final design as set forth in the final safety analysis report.
The review procedures for OL applications include a determn
'on that the content and 9
intent of the technical specifications prepared by the applicant are in agreement with 149 057 9.5.8-3 Rev. 1
the reyuirements for system testing, minimum performance, and surveillance developed as a result of the staff's review.
Upon request from the primary reviewer, the second3ry review bracches will provide input for the areas of review stated in Subsection I.
The primary reviewer obtains and uses such input as req.Jired to assure that this review procedure is complete.
The reviewer will select and emphasize material from the paragraphs below, as may be appropriate for a particular case.
l.
ihe SAR is reviewed to determine that the EDLCAIES description and related diagrams l
clearly delineate the system components and the modes of system operation. The reviewerverifiesthatessentialportionsoftheEDECAIESaredesignedtoappropriatel seismic and quality group classification standards.
2.
The SAR is reviewed to ascertain that sufficient space has been provided around the components to permit inspection of the syste's components.
3.
The SAR is reviewed to assure that the arrangement and location of the combustion air intake and exhaust are such that dilution or contamination of the intake air by exhaust product; or other gases that may intentionally er accidentally be released on site will not precluJe operation of the diesel engines at rated power outpat.
4.
The SAR is reviewed to verity that if the intake air flow or engine exhaust is dependent upon the actuation of flew control devices (louvers, dampers), the EDECAIES l' will function if there is a failure of an active component.
5.
The SAR is reviewed to assure that system components exposed to atmospheric condi-tions (rain, ice, snow)areprotectedfrompossiblecloggigduringstandbyoropera-l n
tinn of the system.
6.
The review verifies that the system will function as required in the event of other adw erse natural phenorrent ihe reviewer evaluates the system, using engineering judgment and failure modes and effects analyses to determine that:
a.
The failure uf nonessential portions of the system or of other systems not designed to seismic Category I requirements and located close to essential por-tior s of the system, or of non-seismic Category I structures th3t house, s up;mr t.
or are close to essential portions of the EDECAIES, will not preclude operation l of the system.
Reference to 5AR sections describing site features and the general arrangement and layout drawings will be necessary, as well as the 5AR tat;ulation of seismic design classifications for structures and systems. Statements in the SAR that verify that the above condit ions are net are accept ible.
O Rev. 1 9.5.8-4 14 ')
053
b.
The essential portions of the system are protected from the effects of floods, hurricanes, tornadoes, and internally or externally generated missiles. Flood protection and missile protection criteria are discussed and evaluated in detail under the SRP sections for Chapter 3 of the SAR.
The location and the desiqn of the systems and structures are resiewed to determine that the degree of protection provided is adequate. A statement to the effect that the system is located in a seismic Category I structure that is tornado missile 3nd flood protected, or that components of the system will be located in individual cubicles cr rooms that will withstand the effects of both flooding and missiles is acceptable.
c.
The essential portions of the system are protected from the effects of high and moderate energy line breaks.
Layout drawings are reviewed to assure that no high or moderate energy piping systems are close to the essential portions of the system, 0-that protection fram the effects of failure will be provided.
The means of providing such protection will te given in Section 3.6 of the SAR and procedures for reviewing this information are given in the corrosponding SRP sections.
7.
The descriptive information, P&I(;s, E[ECAIES layout drawings, and failure modes and l
effects analyses in the SAR are reviewed to assure that functional requiremtnts of the system will be met following design Lasis accidents assuming a concurrent single active component failure. The reviewer evaluates the effects of t :ii' re of aponents, traces the availability of redundant components on system drawings, and checks that the SAR contains verification that the system functional requirements are met.
IV.
EVALUATICN FINDINGS The resiewer ve: ifies that suf ficient information has been prosided and his review supports conclusions of the following type, to be included in the staff's safety evaluation report:
"The emergency diesel generator combustion air intake and exhaust system (EDECAIES) l includes all components and piping of the air intake system from the atmospheric air ntake to its connection ta the engine and all components and piping of the exhaust i
system from its connection to the engine to the point where it exhausts to the atmo-sphere. The scope of the review of the ECECAIES for the
_ plant included l layout drawings, piping and instrumentation diagrams, and descriptive information for the system and au(iliary supporting s / stems that are essential to its safe operation.
[The review has determined the adequ ny of the applicant's proposed design criteria dnd bases for the emergency diesel g nerator combustion air intake and exhaust system and requirements for safe operation of the system during normal, abnormal and accident conditions. (CP)] [The review has determined that the design 0f the emergency diesel generator combustion air intake and exhaust system and auxiliary supoorting systems is in conformance with the design criteria and bases.
(OL)]
h 9.5.8-5 Rev. 1
"The basis for acceptance in the staff review has been conformance nf the applicant's designs, design criteria, and design bases for the emergency diesel generator combus-tion air intake and exhaust system and its supporting systems to the Commission's requ-lations as set forth in the general design criteria, and to applicable regulatory guides, branch technical positions, and industry standards.
"The staff concludes that the design of the emergency diesel generator combustion air intake and exhaust system conforms to all applicable regulations, guides, staff posi-tions, 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."
2.
10 CFR Part 50, Appendix A, General Design Criterion 4, " Environmental and Missile Design Bases."
3.
10 CFR Part 50, Appendix A, General Design Criterion 5, " Sharing of Structures, Systems, and Components."
4.
Regulatory Guide 1.26, " Quality Group Classifications and Standards for Water, Steam,
and Radioactive-Waste-Containing Components of Nuclear Power Plants."
5.
Regulatory Guide 1.29, " Seismic Design Ciassification."
6.
Regulatory Guide 1.68, " Initial Test Programs for Water-Cooled Reactor Power l
Plants."
7.
Regulatory Guide 1.102, " Flood Protection for Nuclear Power Plants."
l 8.
Regulatory CJide 1.117, " Tornado Design Classification."
l 9.
Branch Technical Positions ASB 3-1, " Protection Against Postulated Piping Failures I
in Fluid Systems Outside Containment," attached to SRP Section 3.6.1, and MEB
'-1,
" Postulated Break and Leakage Locations in Fluid System Piping Outside Containment,"
attached to SRP Section 3.6.2.
10.
Branch Technical Position ICSB-17 (PSB) Diesel-Generator Protective Trip Cirt it Bypasses.
Pev. I 9.5.8-6
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