ML20199E405

Rev 1 to Procedure CPP-019, Cluster Sampling for Issue Specific Action Plan VII.b.1

ML20199E405
Person / Time
Site:	Comanche Peak
Issue date:	08/28/1985
From:	Chester J, Ross G EVALUATION RESEARCH CORP.
To:
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References
FOIA-86-36 CPP-019, CPP-19, NUDOCS 8606230291
Download: ML20199E405 (5)

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EVALUATION RESEARCH CORPORATION 0NTROLLED COPY c0NTROL N0Q7 COMANCHE PEAK RESPONSE TEAM PROJECT PROCEDURE FOR ISSUE SPECIFIC ACTION PLAN VII.b.1

, PROCEDURE NO.: CPP-019 REVISION:

1 EFFECTIVE DATE:

8/28/85 CLUSTER SAMPLING FOR ISSUE SPECIFIC ACTION PLAN VII.b.1 i

Prepared by:

Date:

82 85 VII.

IssueCprdinator Approved by:

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On-Site QA Representative 8!M

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Approved by:

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'. N CPP-019 Rev. 1 1.0 PURPOSE This procedure establishes the method to randomly select fabrication documentation and related hardware for review /

reinspection required by ISAP VII,b.1 "Onsite Fabrication" since the total populations of shop fabricated items cannot be reasonably

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estimated.

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~2.0 APPLICABILITY This procedure is applicable to safety-related hardware fabricated in onsite pipe and iron shops and QC accepted for Comanche Peak Units 1, 2 and areas common to both.

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3.0 REFERENCES

3.1 CPP-006 Sample Selection 3.2 CPP-008 Preparation of Verification Packages 3.3 CPRT Program Plan, Appendix D, CPRT Sampling Approach, Applications, and Guidelines 3.4 ISAP VII.b.1, Onsite Fabrication 4.0 GENERAL Random samples of onsite fabrication activities and/or QC documentation will be reinspected and/or reviewed in order to establish, as a minimum, a 95 percent confidence level that 95 percent of the population complies with the acceptance' criteria.

4.1 Responsibilities 4.1.1 Issue Coordinator The VII.b.1 Issue Coordinator selects the random samples and prepares the Random Sample Identification Lists.

4.1.2 Hardware Category I Supervisor The Hardware Category I Supervisor reviews and approves Random Sample Identification Lists.

Moreover, the Rardware Category I Supervisor assures the distribution of approved Random Sample Identification Lists to the required personnel.

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i CPP-019 Rev..I 4.1.3 QA/QC Inspectors QA/QC Inspectors assist in the process to determine the (in) accessibility of the randomly selected items and initiate Requests for Equipment / Services as required.

4.2 Policy Activities performed under this procedure shall conform to the policies contained in the latest Comanche Peak Response Team Program Plan and the applicable Issue-Specific Action Plan (s).

Where an activity is designated as the responsibility of a Category I Supervisor, or higher, it may be delegated by that individual to an individual under his or her supervision.

4.3 Conflicts In the case of a. conflict between this procedure and the documents referenced in Section 4.2, the latter shall govern.

4.4 Definitions 4.4.1 Random Sample - A selection of population items in which each item in the population has an equal chance of being selected.

4.4.2 Accessible Sample Item - An item which can be reinspected without invalidating any previously installed and accepted work. Accessible items may include those items for which scaffolding must be erected. It does not include those items which must be disassembled, such as valve and piping internals and items embedded in concrete.

5.0 PROCEDURE 5.1 Random Sample Selection

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A Population Items List (CPP-005.3) will not be prepared. The VII.b.1 Issue Coordinator establishes the random sample, as required, in.accordance with this procedure.

5.1.1 A minimum sample size of 60 will be selected for each identified population. The populations include:

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ASME supports, machining odiy.

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ASME supports, welded fabrications.

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Non-ASME safety-related supports, machining only.

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CPP-019 Rev.,I

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Non-ASME safety-related supports, welded j

fabrications.

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ASME small bore piping.

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ASME large bore piping.

5.1.2 Identify the total number of file cabinets containing onsite shop fabricated item documentation packages.

NOTE: If documentation is segregated by shop or type fabrication (ASME vs non-ASME, piping vs supports), each group of the cabinets shall be treated independently.

5.1.3 Generate three random number lists as follows:

List A - 1 to N - Where N is the number of file cabinets.

List B - 1 to 5 - Where 5 is the number of file drawers.

List C - I to 96 - Where 96 is the drawer depth in i inch intervals.

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5.1.4 The random numbers on the same line of the three lists define a 1/4" block (cluster) of fabrication records.

Since each cluster obtained may not include items within desired populations, each list should be 200 units long. Each random number list will be generated in accordance with reference 3.1.

5.1.5 Although each cluster of records may be used to identify items in several populations, all items for any given population will be used from a cluster. At least 60 clusters will be sampled for each population.

Once the required 60 clusters for a population are obtained, no additional samples for that population will be selected, but clusters will continue to be extracted until the required sample of 60 is obtained for each population.

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CPP-019 Rev. 1 5.2 Randon Sample Identification List 5.2.1 Preparation. Review, and Approval The VII.b.1 Issue Coordinator documents the selection of the random samples by completing the Random Sample Identification List in accordance with Reference 3.1.

Subsequently, the Hardware Category I Supervisor reviews and approves the completed Random Sample Identification Lists in accordance with Reference 3.1.

5.2.2 Distribution and Control The Hardware Category I Supervisor assures that approved Random Sample Identification Lists are distributed to the:

QA/QC Records Administrator (File Location

[Ltr. ])

QA/QC Reinspection Engineering Supervisor 5.3 Verification Package t

5.3.1 Preparation, Review and Approval The VII.b.1 Issue Coordinator identifies the documents reviewed by preparation of a Documentation Review Verification Package in accordance with Reference 3.2.

The Hardware Category I Supervisor reviews and approves the Documentation Review Verification Package in accordance with Reference 3.2.

If hardware reinspections are required by paragraph 4.1.2.4 of Reference 3.4, a Reinspection Verification Package will be prepared, reviewed and approved in the same manner as the Documentation Review Verification I

Package.

5.3.2 Distribution and Control l

The Hardware Category I Supervisor assures that approved Verification Packages are distributed to the same persons identified in paragraph 5.2.2 above.

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6.0 ATTACHMENTS NONE e

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