ML18033A163

Rev 0 to Civil Engineering Branch Instruction CEB-C1.102, Operability Criteria for Miscellaneous Steel.

ML18033A163
Person / Time
Site:	Browns Ferry
Issue date:	03/03/1988
From:	Evans E TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML18033A162	List: ML18033A161 ML18033A163
References
CEB-C1.102, TAC-R00295, TAC-R00296, TAC-R00297, TAC-R295, TAC-R296, TAC-R297, NUDOCS 8803170028
Download: ML18033A163 (7)

Text

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TENNESSEE VALLEYAUTHORITY Tennessee Valky Division of Nuclear Engineering Authority CIVIL ENGINEERING BRANCH INSTRUCTION CEB-C1.102 OPERABILITY CRITERIA FOR MISCELLANEOUS STEEL REVISION RO R2 R3 R4 R5 ISSUE DATE e~ 03 1988 PREPARED CHECKED REVIEWED APPROVED 8803170028 880310 PDR ADOCK 05000260 p DCD

REVISION LOG

Title:

OPERAB'?LITY CRITERIA FOR, MISCELLANEOUS STEEL CEB-C1.102 Revision Date No. DES CR I PTI ON OF REVISION Approved TVA 10534 (EN DES 4 78)

OPERABILITY CRITERIA FOR MISCELLANEOUS STEEL CEB-C1.102 TABLE OF CONTENTS PAGE 1.0 PURPOSE 2.0 SCOPE 3.0 MISCELLANEOUS STEEL EVALUATION CRITERIA 4.0 DOCUMENTATION

5.0 REFERENCES

TVA I0535 (EN DES-7-77)

OPERABILITY CRITERIA FOR MISCELLANEOUS STEEL CEB-C1.102 1.0 PURPOSE The purpose of this instruction is to provide engineering requirements for implementing Browns Ferry operability criteria as applicable to miscellaneous steel used to support piping and HVAC.

2.0 SCOPE These criteria shall apply to those miscellaneous steel structural members that do not qualify according to Design Criteria BFN-50-C-7100, Attachment G (Reference 5.1). Modifications will be prioritized into two groups; those that require implementation for operability prior to restart and those that require implementation post-restart. Operability modifications are those modifications that do not comply with the criteria in this document and that must be made before restart. Design criteria modifications are those modifications that comply with the requirements of this document but do not meet design criteria 3.0 MISCELLANEOUS STEEL EVALUATION CRITERIA 3.1 LOAD COMBINATIONS For operability evaluation, the miscellaneous steel modifications that does not meet design criteLia shall be evaluated only for Loading Condition 8, shown below, in accordance with BFN-50-C-7100, Attachment G.

Abnormal Accident + DBE + Seismic =

DL + LL + Ta + Ra + Pa + 1.0(Y3 + Yr + Ym) +E1 3.2 ALLOMABLE LIMITS The following limits shall be used to establish priorities for modifications to miscellaneous steel.

3.2.1 Structural Steel Members Stresses in structural steel members shall not exceed the lesser of 1.2Fy and 0;7Fu for tensile and flexural stresses and 90 percent of the critical buckling stress in compression flonge as defined in AISC specification (Reference 5.2) for compressive loads. Shear stresses shall not exceed 60 percent of allowable stress for tensile and flexural stresses.

3. 2. 2 B~oltin The stress allowables for bolting shall be the greater of 70 percent of the minimum specified tensile strength or the minimum specified yield stress of the bolt material.

3.2.3 Concrete E ansion Anchors The minimum factors of safety for concrete expansion anchors (wedge and shell types) shall be 2.0 (Reference 5.3).

3311D 1 TVA t0535 (EN OES-7-77)

OPERABILITX CRITERIA FOR MISCELLANEOUS STEEL CEB-C1.102 4.0 DOCUMENTATION Engineering evaluations performed to determine the priority of modifications shall be documented in calculations performed in accordance with the applicable QA requirements".

5.0 REFERENCES

5.1 Design Criteria for Miscellaneous Steel Structures, BFN-50-C-7100, Attachment G Components for Class I and II 5.2 Specification for the Design, Fabrication, and Erection of Structural Steel Buildings, AISC 7th and 8th Editions 5.3 IE Bulletin No. 79-02, Revision 1, Supplement 1 dated August 20, 1979, Pipe Support Base Plate Designs Using Concrete Anchor Bolts 3311D TVA I0535 (EN OES-7-77)