ML20081A614
| ML20081A614 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 08/26/1983 |
| From: | Durand R MARK TECHNOLOGIES CORP. |
| To: | |
| Shared Package | |
| ML20081A593 | List: |
| References | |
| 8301-WTP-4-Q, NUDOCS 8310260340 | |
| Download: ML20081A614 (7) | |
Text
J PROCEDURE FOR RESOLUTION OF SSIP/S
't POSTULATED INTERACTIONS i
PROJECT: Midland Energy Center Spatial Systems Interaction Prcgram/ Seismic PROJECT NO: 8301 WORK TASK PROCEDURE NO: 8301 -WTP-4-Q REVISION NO: 1 DATE: August 26, 1983 f
PAGE: 1 of 7 t
s PREPARED BY/DATE:
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APPROVED BY/DATE:
B310260340 831019 PDR ADDCK 05000329 NWA"O Di!J
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MARK TECHNOLOGIES CORPORATION 333 Hayes Street San Francisco, California 94102
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s 8301-WTP-4-Q Revision 1 Page 2 of 7 TABLE OF REVISIONS Revision 0, Date: August _ 10,_1983 Original Issue.
Revision 1,
-Date: August 26.-1983 Revised II.B, IV.B, IV.D, IV.E, IV.F, V.B, V.C, IV.D.'
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8301-WTP-4-Q Revision 1 Page 3 of 7 Procedure for Resolution of SSIP/S Postulated Interactions I.
SCOPE This procedure describes the activities and steps required to acceptably resolve interactions postulated in accordance
-with References A and B.
Resolution of interactions by three' basic. methodologies are covered:
- 1) Resolution by Walkdown.- Team evaluation, 2) resolution by analysis and 3) resolution by plant modification.
II. RESPONSIBILITIES A.
The Project Manager is responsible for the implementa-tion of this procedure, and approves all interaction resolutions, except those resolved by Walkdown Team evaluation.
B.
The Walkdown Team Leader.is responsible for the resolu-tion and approval of interactions by the Walkdown Team at the time of walkdown.
III. DEFINITIONS I
(
A.
Walkdown Team Leader - A Walkdown Team Member who does
(
not represent one of the required walkdown team disci-l plines, and is responsible for_ uniform site evaluations in accordance with the Program Manual (Reference A).
The Walkdown Team Leader is also the administrative coordinator for the walkdown and approves all walkdown documentation.
B.
Engineer
- The individual responsible for the performance of engineering analyses and/or generation of design recommendations as part of the resolution of a postulated' interaction.
l C.
Interaction Identification Sheet (IIS) - The IIS is the l'
document which describes the interaction and contains resolution information (See Exhibit A of Reference C).
D.
Postulated Interaction - The interaction of a source component with a target component as postulated by the Walkdown Team being caused by a seismically-induced failure or behavior of the source component.
l l
s-e Revision 1 Page 4 of 7 E.
Resolution Report - A summary of activities undertaken
'to resolve postulated interactions through office-based analysis.
Resolution. Reports.
are prepared in accordance with Reference E.
F.
All other definitions for terms used in this procedure are given in the Program Manual (Reference A).
I
V. PROCEDURE
A.
Once a credible postulated interaction has been identified in accordance with the SSIP/S Program Manual (Reference A),
the IIS is completed in accordance with Reference C.
The. resolution of the interaction is handled at the time of walkdown identifications per Paragraph B below, or is referred to the MTC office-based engineering staff for further resolution analysis per Paragraph C below.
The Walkdown Team indicates a recommended resolution method on the IIS to assist in the commencement of office-based engineering analysis.
B.
Resolution by Walkdown Team Evaluation is performed only at the time of the walkdown.
These resolutions are documented in accordance with Reference C.
The Postulated interaction is reviewed and if in the judg-ment of the Walkdown Team using available data, ex-
,perience or engineering principles the interaction is not credible or does not adversely affect the. safety-related function of the target, it is so noted on the IIS and no further engineering action under the SSIP/S is requirsd.
Engineering judgment.is supported by l
stated justification.
i l
C.
Resolution 'of postulated interactions by office-based engineering analysis is handled in one of two ways:
l 1.
Resolution by Analysis results from the Walkdown l
Team's recommendation that further analysis is required for resolution because the interaction's complexity is beyond the capability of the team to resolve at the time of walkdown.
In this case, each interaction is to be analyzed to determine l
the source seismic behavior or if the interaction adversely affects the safety-related function of L
the target component.
Engineering judgment when L
used as part of the analysis must be supported by l
a stated rationale or a detailed analysis.
t l
t
0 t i 8301-WTP-4-Q Revision 1 Page 5 of 7 2.
Resolution by Plant Modification results from 1) the failure to show by analysis that the interaction was not detrimental to the target component, or 2) the decision to resolve the interaction by designing a plant modification.
In this case, the Engineer prepares a resolution summary describing the proposed modification which is then submitted to the CPCo SSIP/S Project Engineer for implementation of the modification in accordance with established Midland Energy Center project procedures.
D.
Interaction resolutions performed in accordance with C1 and C2 above are documented per References C, D, E and F. Resolution Reports, prepared and controlled as Project Technical Reports (Reference E) are generated for ong or more interaction resolution to document the resolution efforts, describe the analysis methods and conclusions, and to provide, if required, necessary data to enable other Midland Energy Center engineering groups to design plant modifications.
Office-based engineering resolution activities required to acceptably resolve postulated interactions include the following steps:
~~
1.
Assemble existing drawings and data pertaining to L
the source and/or target.
-Resolution work in-volving safety related components shall use the best available controlled information. Extent of such data and the accuracy needed for a particular resolution will be determined by the Engineer performing the work.
2.
If required, physically verify the as-installed configuration of the components to be analyzed.
3 State the interaction phenomena which will be treated by the resolution, i.e.
deflection of source or target, source structural failure, impact analysis of the source.or target, etc.
4.
If not so indicated on the IIS, identify all cascading source loads that may be present in the particular interactica being analyzed.
If no cascading source loads are present, such as a pipe deflecting into a source electrical cabinet which is being analyzed for overturning, so state this observation in the resolution description.
t 8301-WTP-4-Q Revision 1 Page 6 of 7 5.
State the acceptance criteria for the resolution analysis being performed, i.e. allowable stresses, maximum deflections, acceptable impact loads, target functional requirements, etc.
6.
Generate
' calculations, analyses or other engineering justifications in support of the engineering resolution.
Such documents shall be prepared and controlled in accordance with References D, E and F as appropriate.
7.
State the final conclusion (s) of the interaction resolution.
E.
When resolution by analysis or plant modification requires the use of input data from analyses performed by Bechtel, and/or Q drawings, specifications or other Bechtel Q documents, a listing of the Bechtel calcu-lations or document number and revision shall be clear-ly indicated in the Resolution Report to subsequently verify the applicability of the input information.
F.
When calculations and/or tests are performed which apply to multiple interactions, the IIS's shall reference the appropriate calculation or test documents as.the basis of the interaction resolution. Calcula-tions used for multiple interaction resolutions shall have stated the rationale for use.
V.
REQUIRED DOCUMENTATION A..
IIS's shall be used for final summarization of the documentation of all interaction resolutions in accordance with Reference C.
B.
-Analyses, calculations, test reports, etc. generated in support of interaction resolutions shall be documented in accordance with References D, E, F, and refere'nced on the IIS.
C.
Design documents required to resolve interactions resulting from a modification re. commendation shall-be generated by others.
D.
Documents generated in accordance with A and B above shall be controlled in accordance with the provisions of ATP-10-Q for controlled documents (Reference G).
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4 s-8301-WTP-4-Q Revision 1 Page 7 of 7 VI. REFERENCES A.
" Program Manual:
Spatial Systems Interaction Program / Seismic, Midland Energy Center," Consumers Power Company, latest revision.
B.
MTC.Procedurs No.
8301-WTP-3-Q Procedure for Performing Walkdowns of SSIP/S Targets, latest revision.
C.
MTC Procedure No.
8301-WTP-1 -Q Procedure for Documentation of Postulated Interactions, latest revision.
D.
MTC Procedure No.
ATP-12-Q Procedure for Performance of Engineering Calculations and Technical
- Studies, latest revision.
E.
MTC Procedure No.
ATP-13-Q Procedure for the Prepara-tion of Project Technical Reports, latest revision.
F.
MTC Procedure No.
8301-WTP-5 Procedure for Performsnee 1x0 Engineering Tests, latest revision.-
G.
MTC Procedure No.
ATP-10-Q Procedure for Document Control, latest revisiong
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