Method of offering wall-thickness thinning prediction information, and computer-readable recording medium storing wall-thickness thinning prediction program, and method of planning piping work plan

• US 7,089,165 B2
• Filed: 03/02/2005
• Issued: 08/08/2006
• Est. Priority Date: 03/31/2000
• Status: Expired due to Fees

• Current Assignee: Hitachi-Ge Nuclear Energy Limited (Hitachi, Ltd.)
• Original Assignee: Hitachi, Ltd.
• Inventors: Aoike, Satoru, Hisatsune, Masakazu, Araki, Kenji, Takada, Masatoshi, Takeuchi, Chikara, Noujima, Masafumi, Utaka, Kenji
• Primary Examiner(s): FREJD, RUSSELL WARREN
• Application Number:
  US11/068,919
• Publication Number:
  US 20050149305A1
• Time in Patent Office: 524 Days
• Field of Search: 703/2, 703/9, 703/22, 376/249, 73/86
• US Class Current: 703/9
• CPC Class Codes: G01N 17/00 Investigating resistance of materials to the weather, to corrosion, or to light
• CPC Class Codes: G01N 17/006 of metals
• CPC Class Codes: G06F 2111/10 Numerical modelling
• CPC Class Codes: G06F 2113/14 Pipes
• CPC Class Codes: G06F 30/13 Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
• CPC Class Codes: G06F 30/20 Design optimisation, verification or simulation optimisation, verification or simulation of circuit designs G06F30/30
• CPC Class Codes: G21C 17/017 Inspection or maintenance of pipe-lines or tubes in nuclear installations
• CPC Class Codes: Y02E 30/30 Nuclear fission reactors

Abstract

A wall-thickness thinning rate at a not-measured position is estimated using information having a small number of measured points. Simulation of behavior of fluid flowing inside a pipe line is performed based on wall-thickness data of pips and three-dimensional layout data of the pipe line including the pips using a computer, and simulated wall-thickness thinned data of the pipes composing the pipe line is calculated from change of the simulated behavior of fluid.

Claims

1. A system for predicting a thinned wall-thickness of a piping of a plant in which a wall-thickness of a piping is predicted under wall-thickness data in which a wall-thickness of piping parts of said plant is specified, the system comprising:

a wall-thickness data inputting means for inputting said wall-thickness data of said piping parts of said plant;

computer simulation means for simulating a change of a behavior of fluid which flows into an interior portion of said piping parts,

execution means for performing pipe wall-thickness thinning prediction processing for said piping parts of said plant according to said simulated change of behavior of said fluid; and

outputting means for outputting results calculated by said execution means,

further comprising replacing work plan processing means for performing piping part replacement for certain piping parts satisfying a predetermined criteria of thinning.

2. A system for predicting a thinned wall-thickness of a piping of a plant in which a wall-thickness of a piping is predicted under wall-thickness data in which a wall-thickness of piping parts of said plant is specified, the system comprising:

a wall-thickness data inputting means for inputting said wall-thickness data of said piping parts of said plant;

computer simulation means for simulating a chance of a behavior of fluid which flows into an interior portion of said piping parts,

execution means for performing pipe wall-thickness thinning prediction processing for said piping parts of said plant according to said simulated change of behavior of said fluid; and

outputting means for outputting results calculated by said execution means,

wherein pipe wall-thickness thinning prediction processing is performed by said execution means by executing a wall-thickness prediction program stored in a memory.

3. A system for predicting a thinned wall-thickness of a piping of a plant in which a wall-thickness of a piping is predicted under wall-thickness data in which a wall-thickness of piping parts of said plant is specified, the system comprising:

a wall-thickness data inputting means for inputting said wall-thickness data of said piping parts of said plant;

computer simulation means for simulating a change of a behavior of fluid which flows into an interior portion of said piping parts,

execution means for performing pipe wall-thickness thinning prediction processing for said piping parts of said plant according to said simulated change of behavior of said fluid; and

outputting means for outputting results calculated by said execution means,

wherein pipe wall-thickness thinning prediction processing includes calculating a wall-thickness thinning rate per unit shear stress at a maximum wall-thickness thinning position in one of said piping parts.

4. A system for providing wall-thickness thinning prediction information in which wall-thickness data of piping parts of pipe lines is received from a client, and simulating wall-thickness data of the piping parts based on the received wall-thickness data, the system comprising:

means for simulating behavior of fluid flowing inside a pipe line based on said received wall-thickness data of said piping parts of said pipe line and three-dimensional layout data of said pipe line including said piping parts;

means for calculating simulated wall-thickness data of said piping parts of said pipe line from a change of said behavior of fluid simulated; and

outputting means for sending said simulated thinned wall-thickness data to the client,

wherein said three-dimensional layout data is data sent from the client.

5. A system for providing wall-thickness thinning prediction information in which wall-thickness data of piping parts of pipe lines is received from a client, and simulating wall-thickness data of the piping parts based on the received wall-thickness data, the system comprising:

means for simulating behavior of fluid flowing inside a pipe line based on said received wall-thickness data of said piping parts of said pipe line and three-dimensional layout data of said pipe line including said piping parts;

means for calculating simulated wall-thickness data of said piping parts of said pipe line from a change of said behavior of fluid simulated; and

outputting means for sending said simulated thinned wall-thickness data to the client,

wherein said piping parts composing said pipe line includes a piping part different from said piping parts shown by said wall-thickness data of said piping parts received from said client.

6. A system of planning a piping work plan, the system comprising:

means for estimating wall thickness of a pipe in a future time by simulating behavior of fluid flowing in the pipe; and

means for forming plan for replacing the pipe based on the estimated wall thickness

wherein said means for estimating wall thickness of a pipe is performed by executing a wall-thickness prediction program stored in a memory.

7. A system of planning a piping work plan, the system comprising:

means for estimating wall thickness of a pipe in a future time by simulating behavior of fluid flowing in the pipe; and

means for forming plan for replacing the pipe based on the estimated wall thickness,

wherein said means for estimating wall thickness of a pipe calculates a wall-thickness thinning rate per unit shear stress at a maximum wall-thickness thinning position of said pipe.