Structural integrity assessment

The following reasons support the claim of high structural reliability of CEFR s primary coolant pipes  

In the CEFR design, the primary coolant pipes are located between the upper and the lower core support. Thus, in the event of a DEGR of a primary coolant pipe, the pressure shock will not damage the bottom of the vessel. The results of comprehensive accident analyses have shown that the integrity of the pressure boundary of the primary vessel is maintained. 

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Life extension of existing critical industrial installations is a major challenge for today s applied research in this context structural integrity assessment and monitoring play an essential role. 

BE-1426 Structural integrity assessment procedures for European industry Mr. E. Stephen Wabiter British Steel PLC... 

Chamber lifetime is among the considerations that would have a significant impact on cost, reliability, and safety. Were the U.S. Army to further investigate any of the detonation-type technologies examined in this report, a structural integrity assessment for the number of detonation cycles that could be anticipated for the life of the detonation chamber with respect to the types of munitions to be processed would give important information. Likewise, a failure modes and effects analysis for each type of detonation system under consideration would be highly desirable. 

Hasselmann, K., Hasselmann, S. Giering, R., Ocaa, V., and Storch, H. v. (1997). Sensitivity study of optimal CO2 emission paths using a simplified Structural Integrated Assessment Model (SIAM). Climatic Change 37,345-386. 

Core support structure design with square grids at the central portion and radial stiffeners around the periphery has been recommended. Structural integrity assessment has demonstrated that even with the absence of the most critical radial stiffener, the reduction of rigidity of the structure is within the acceptable limits from reactivity insertion considerations. 

The purpose of the plant dynamics study is to determine power, flow, temperature and pressure transients under various design basis events (DBE). These parameters are essential for deciding on the requirement of NRV, flow halving time and for arriving at reactor shutdown parameters along with the corresponding threshold values. The evaluation of temperature, pressure and flow are the input to the structural integrity assessment. 

For the structural integrity assessment of control plug mockups, 75 thermal shocks have been given so far, based on the preliminary estimation of crack initiation. No visible cracks have been noticed due to the possible statistical variations in the creep-rupture properties. In order to continue the tests, the copper cylinder which was originally provided to simulate the temperatures on the outer shell of mock up, is to be replaced by mild steel cladded with SS. Theoretical analysis has been completed to confirm the use of mild steel in place of copper. 

Each of these actions will require regulatory approval within each country. Specific structural integrity assessments will need to be performed to satisfy... 

Brear, J.M. and Church, J.M., Technical basis for API Publication RP941 (Nelson Curves) , Third Int Conf Engineering Structural Integrity Assessment, Cambridge, September 1996... 

Rotter, J.M. (1999) Flow and pressures in sdo structural integrity assessments. Proceedings of the International Symposium Reliable Flow of Particulate Solids III, Porsgrunn, Norway, August 1999, pp. 281-292. 

Elastic Poisson s ratio is usually taken as 0.2 [24]. It should be noted that it is usual to measure Young s modulus using a dynamic method (DYM). Therefore, when carrying out structural integrity assessments, this may require converting to a static value (see Ref. [25]). 

The implementation of Charlotte Criteria Item DB-2.1 provided seismic capability to the SSS. The seismic qualification of the SSS components is described in the technical report on the structural integrity assessment of the system (Reference 72). 

WSRC/SRL, SRL-EDG-90-283, Task 90-019-1, Subtask 6, "SER - Structural Integrity Assessment - Reactor PWS Leak Detection Capability and Requirements for Reactor Operation," September 5, 1990. 

WSRC, WSRC-TR-90-323, "Structural Integrity Assessment of the Emergency Cooling System - K-, P-, and L-Reactors - Savannah River Site,"... 

The TM heard ten papers. There was ample time allocated to discussion, and the participants did engage in a very lively dialogue. From the overall deliberations, the following four main themes emerged safety philosophy, structural integrity assessment, thermal hydraulics, and new concepts. 

The flow diagram of the structural integrity assessment for primary coolant pipe is shown in Fig. 1. 

Postulating the same initial flaw at the same location as at that used in the structural integrity assessment, fatigue crack growth simulation was conducted up to a through-wall-penetration using FRAMSAP 5 . The result is shown in Fig. 3. 

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