ML20040B728
| ML20040B728 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 07/31/1981 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20040B716 | List: |
| References | |
| NUDOCS 8201260363 | |
| Download: ML20040B728 (10) | |
Text
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APPENDIX D ATTACHMEliT I i
SEB INTERIM CRITERIA FOR SfJETY-RELATED PA50MRY WALL EYALUATION REVISION 1
'. July 1981 6201260363 820119 PDR ADOCK 05000416 G
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e TABLE OF C04' TENTS 1
1.- General Requirements i
'2.
Loads and Load Combinations a.
Service Load Conditiont b.
Extreme Environmental, Abnormal. Abnormal / Severe Environmental, and Abnormal / Extreme' Environmental Conditions l
l 3.
Allowable Stresses t
4.
Design and Analysis Considerations 4
5.
References j
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3.
General Requirements The steriels, testing, analy' sis, design, construction and inspection relatedsto the design and construction of safety-related concrete masonry-walls shall confor::: to the applicable requirements contained in Unifor:n Building Code - 1979, unless specified otherwise, by the provisions in thi_s criteria.
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The use of other standa-ds or codes, such as ACI-531, ATC-3 or NCMA are also acceptable.
However, eben the provisions of these codes are less ccaservative than the corresponding provisions of the interim criteria, their use should be justified on a case-by-case basis.
In new construction, no unreinforced masonry wall will be pemitted.
g For operating plants, existing unreinforced walls will be evaluated by the provisions of this criteria. Plants applying for operating license which have already built unreinforced masonry walls, will be evaluated on a case by case basis.
2.
Loads and Load Combinations The loads and load combinations shall include consideration of nortnal
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i-loads, severe environmental load, extreme environmental load, and
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abnorm 1 loads.
Specifically, for operating plants the load combinations 1
provided in plant's FSAR shall govern. For operating license applications, the following load combinations shall apply (for definition of load tems, see SRP Section 3.8.4.11-3).
(a) Service Load Conditions (1) D+L (2)
D+L+E (3)
D+L+W
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D+L+T+R o
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D+L+T+R+E o
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(3a)
D+L+T+R+V o
o vy Chect load combination for controlling condition for maximum
'L' and for no
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(b) Extreme Environmental, Abnomal. Abnortnal/ Severe Environmental
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and Abnormal / Extreme Environmental Conditions (4)
D+L+T+R+E I
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D+L+T+R+W o
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(6) D + L + T + R + 1.5 P a
a a-(7) D + L + T + R + 1.25 P + 1.0 (Y + Y + Y ) + 1.25 E a
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m (B) D4 L + T + R + 1.0 P + 1.0 (Y + Y + Y ) + 1.0 E' a
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m In combinations (6), (7), and (8), the maximum values of P, T, R., Y, Y, and Y, including an apprcpriate dynamic a
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a load f actor, should be used unless a time-history, analysis is performed to justify otherwise. Combinations (5), (7) and (8) and the corresponding structural acceptance criteria should be satisfied first without the tornado missile load in (5) and without Y, T, and Y in (7) and (8). When considering these r
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lo' ads, local section strength capacities may be exceeded under these concentrated loads, provided there will be no loss of function of any safety-related system.
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2.
2 Both cases of L having its full value or being completely absent should be checke 1.i; 1
- 3. ' Allowable Stresses Allowable stresses provided in ACI-531-79, as supplemented by the following 5 P
- 1 modificaticns/ exceptions shall apply.
(a) When wind or seismic loads (OBE) are considered in the loading combinations, no increase in the, allowable stresses is pertnitted.
(b) Use of allowable stresses corresponding to special inspection category shall be substantiated by demonstration of compliance with the inspection requirements' of the SEB criteria.
(c) When tension perpendicular to bed joints is used in qualifying the unreinforced masonry walls, tile allowable value will be justified by te'st program or other means pertinent to the plant and loading conditions. For reinforced masong walls, all the tensile stresses will be resisted by reinforcement.
(d) For load conditions, which represent extreme environmental, abnormal, abnormal / severe environmental, and abnormal / extreme environmental conditions the allowable working stresses may be nultiplied by the factors.showrt in the following table:
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o TYPE OF STRESS FACTOR (1)
Axial or Flexural Compression 2.5
-4 Bearing 2.5 Reinforceme'nt stress except shear 2.0 but not to exceed 0.9 fy
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Shear reinforcement and/or bolts 1.5 Masonry tension parallel to bed joint 1.5 Shear carried by masonry 1.3 Masonry tension perpendicular to bed joint for reinforced masonry 0
i for unreinforced masor;ry(2) 1.3 i
Notes (1) When anchor bolts are used, design should prevent facial spalling of masong unit.
(2)
See 3 (c').
4.
Design and Analysis Considerations (a) The analysis should follow established principles of engineering mechanics and take into account, sound engineering practices.
1 (b) Assumptions and modeling techniques used shall give proper l
considerations to boundary conditions, cracking of sections, if arty, and the @namic behavior of masonry walls.
(c) Dartping values to be used for @namic analysis shall be those for reinforced contrei.e given in Regulatory Guide 1.61.
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(d) In general, for operatin'g plants the seismic analysis and Capgory I structural requirements of FSAR shall apply. For other plants, corresponding SRP requirements shall apply. The seismic analysis shall account for the variations and uncer-tainties in mass, materials and other pertinent parameters used.
(e) The analysis should consider both in-plane and out-of-plane loads.
(f) Interstory drif t effects should,be considered.
(g) In new construction, grout in concrete ma,onry walls, whenever used, shall be compacted by vibration.
(h) For masonry shear walls, the minimum reinforcement requirements s
of ACI-531 shall apply.
(1) Special constructions (e.g. multiwythe, composite) or other items not covered by the code shall be reviewed on a case-by-case basis for their acceptance.
(j) Licensees or app'.icants shall submit QA/QC informatio'n, if available, for staff's review.'
In the event, QA/QC information is not available, a field survey and a
' test program reviewed and approved by the staff shall be implemented to ascertain the conformance of masonry construction to design drawings and specifications (e.g. rebar' and grouting).
l (k) For masonry walls requiring protection from spalling and scabbing due 1
to accident pipe reaction (Y ), jet impingement (Y ).and missile impact r
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t (Y ), the requirements of SRP 3.5.3 shall apply.
Any deviation from the.SRP 3.5.3 shall be reviewert and approved on a case 4 -case basis.
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i 5.
Referer, es (a) Uniform Buf1 ding Code - li79 Edition i
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(b)
Building Cod? Requirements for Concrete Masonry Structures
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ACI-531 - 79 and Cowentary AC2-531R - 79.
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(c) Tentativt Provisions for the Develop:hent of Seismic Regulations for Buildings - Applied Technology Council ATC 3-06.
(d)
Specification for the Design and Construction of Load-bearing Concrete Masonry - NCMA August,1979.
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l (e)
Trojan Nuclear Plant Concrete Masonry Design Criteria Safety Evaluation Report Supplement - November,1980.
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APPENDIX E h
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APPENDIX E ARCHITECTURAL SPECIFICATIONS l
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