ML20199E325

Rev 1 to Procedure CPP-006, Sample Selection

ML20199E325
Person / Time
Site:	Comanche Peak
Issue date:	08/09/1985
From:	Ross G EVALUATION RESEARCH CORP.
To:
Shared Package
ML20199D912	List: ML20199D907 ML20199D928 ML20199D956 ML20199D983 ML20199D994 ML20199E006 ML20199E012 ML20199E027 ML20199E033 ML20199E048 ML20199E053 ML20199E076 ML20199E102 ML20199E110 ML20199E114 ML20199E130 ML20199E142 ML20199E151 ML20199E163 ML20199E175 ML20199E181 ML20199E187 ML20199E196 ML20199E201 ML20199E216 ML20199E232 ML20199E240 ML20199E249 ML20199E268 ML20199E282 ML20199E295 ML20199E303 ML20199E321 ML20199E325 ML20199E331 ML20199E349 ML20199E358 ML20199E361 ML20199E383 ML20199E389 ML20199E394 ML20199E405 ML20199E412 ML20199E430 ML20199E435 ML20199E529 ML20199E538 ML20199E554 ML20199E560 ML20199E573 ... further results
References
FOIA-86-36 CPP-006, CPP-6, NUDOCS 8606230265
Download: ML20199E325 (10)

Text

w Pzg2 1 of 7 EVALUATION RESEARCH CORPORATION COMANCHE PEAK RESPONSE TEAM PROJECT PROCEDURE FOR QA/QC ISSUE-SPECIFIC ACTION PLANS PROCEDURE NO.: CPP-006 pf 43D.>g(b REVISION:

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1 CPP-006 Rev.

1 1.0 PURPOSE

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This procedure establishes the[ktliod' tol)ranifoaly s, elect 3 tcas and

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i related documentation for reinspection / review utilizing established statistical techniques required by applicable Issue-Specific Action Plans.

2.0 APPLICABILITY This procedure is applicable to safety related hardware constructed and QC accepted at Comanche Peak Units 1, 2, and areas common to both units.

3.0 REFERENCES

3.1 CPP-005 Establishing Populations 3.2 CPRT Program Plan, Appendix D, CPRT Sampling Approach, l

Applications, and Guidelines 3.3 CPP-012 QA/QC Interface with Constructor and TUGC0 3.4 CPP-008 Preparation of Verification Packages 4.0 GENERAL Random samples of complete safety related construction activities and/or QC documentation will be reinspected and/or reviewed in order to establish, at a minimum, a 95 percent confidence level that 95 percent of the population complies with the acceptance criteria.

The first sample provides information about the total population.

As required by Issue Specific Action Plan (ISAP) VII.c, a second sample provides additional information about a portion of the total population that is required for safe shutdown.

NOTE:

M, as defined in this procedure is not required per hehow mg).

4.1 Responsibilities 4.1.1 _^^'y _ _ _^-4G G"" E 7 EN isni h terec a l,p,ct.that. random, samples and prepa@

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CPP-006 Rev.

1 4.1.2. 4A/QC:i.ead>Discipitiie?Eng'i _. --m/ Category I;Sup%.w.er~.

.e.w.es neers ervisorse' The QA/QC Lead Disc hline Engineers / Category I Supervisors gevieweand approve Random-Sample

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,IdentiificatloE ffiYif N '"'

• Moreover, the QA/QC Lead Discipline Engineers ensure the distribution of approved Random Sample Identification Lists to the required personnel.

4.1.3 QA/QC Inspectors WQCf?_n%~s" assist in the process to determine the kin)sdEasis'i[i[lik"iifthe 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, ERC Management Program Plan, and the applicable

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Issue-Specific Action Plan (s).

Where an activity is designated as the responsibility of a QA/QC Lead Discipline Engineer / Category I Supervisor, or higher, it may be delegated by that individual to an

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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't l

4.4 Definitions 4.4.1 First Random Sau.ple - A selection of population items l

in which each item in the population has an equal chance of being selected.

4.4.2 Second Random Sample - Items' selected from the safe shutdown systems or, for populations such as concrete which do not directly contain items in the safe shutdown systems, comprises items which support those systems, or are in locations where failures could adversely impact these systems.

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4.4.3 Accessible Sample Item - An item which can be reinspected without invalidating any previously installed and accepted work. Accessible items may l

include those items for which scaffolding must be w'.

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C?P-006 Rev.

1 5.0 PROCEDURE 5.1 Random Sample Selection Upon completion of the Population Item List in accordance with Reference 3.1, the QA/QC Discipline Engineers establish random samples as follows.

In addition, Issue Ccordinators establish random samples, as required, in accordance with this procedure.

5.1.1 Assign a sequential number, beginning with one to each item in the population.

(This may be accomplished by writing the numbers on a copy of the approved Population Item List.)

5.1.2 Determine the number of itens in the population which are unrelated to safety, incomplete, and/or unaccepced by QC.

The number of remaining items is the estimated population size.

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5.1.3 Using Table 5.i-1, determine the mini =um sample size which corresponds to the estimated population size.

Reference 3.2 establishes minimum sample sizes.

NOTE:

Establish a longer list of randomly selected items in case a particular item is inaccessible.

TABLE 5.1-1 SAMPLE SIZE FOR POPULATIONS MINIMUM RANDOM POPULATION SIZE SAMPLE SIZE

• 01-45 all 46-100 45 101-or more 60 l

5.1.4 Determine the particular table of random digits in accordance with instructions in "A Million Random Digits,"** then place a decimal in front of each set of five random digits and multiply it by the population size.

1 For the second random sample (refer to Section 5.2), include those l

items from the first randomly selected sample that are required for safe shutdown.

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1 5.1.5 /Dr,op gh decimal portion of the product and add"one.

y t l(The result will the same as the previously assigned sequential number.of an item (refer to Paragraph 15.1.'1),~thereby randomly selecting the item.

Example: Generate a sample of 60 items from a population of size 900.

Sample Random Population Randoc Number Digits Size Number 01 f=3 04146-900] ',,}= "37.314 x

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900 669.429 = 669 + 1 =

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5.1.6 Establish the validity of each randomly selected item by confirming that it is complete, i.e.,

incorporates all changes, is QC accepted, and is accessible.

NOTE: QA/QC Inspectors assist in the process to determine the (in) accessibility of the randomly selected items.

When equipment and/or services are required, e.g.,

scaffolds, lights,'ecc., in order to perform reinspections, Inspectors initiate Requests for Equipment / Services in accordance with Reference 3.3 5.1.7 If a selected item is found to be an. invalid part of the population, or inaccessiblefthe next; random number 3.....girserated)-

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5.2 Second Random Sample

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CPP-006 Rev.

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Items identified in the first random sample that are required 1

for safe shutdown shall be included in the second random sample.

The QA/QC Discipline Engineers / Issue Coordinators establish the second random sample according to the procedure in Section l

5.1, except they also determine whether the randomly selected item is or is not within any system identified in the Final Safety Analysis Report (Section 7.4) as being required for safe shutdown and identified in Table 5.2-1.

TABLE 5.2-1 SYSTEMS REOUIRED FOR SAFE SHUTDOWN Auxiliary Feedwater System (AFWS)

Atmospheric Steam Relief Valves (PORV's)

Chemical and Volume Control System (CYCS)

Residual Heat Removal Systcc (RHRS)

Pressurizer Pressure Control During RCS Depressurization Station. Service Water System (SSWS)

Component Cooling Water System (CCWS)

Onsite Power Systems (Diesels, D. C.)

Control Room Ventilation System ESF Ventilation System Safety Chilled Water System UPS Ventilation System Monitoring Indicators in the St. Gen., RCS, Cond. Stor.

Tank, Boric Acid Tank 5.3 Random Sample Identification List 5.3.1 Prenaration, Review. and Apnroval The QA/QC Discipline Engineers / Issue Coordinators document the selection of the random samples by completing the Random Sample Identification List in accordance with Attachcent 6.1.

Subsequently, the QA/qC Lead Discipline Engineer / Category I Supervisor reviews and approves complete Random Sample Identification Lists in accordance with Attachment 6.1.

5.3.2 Distribution and Control j

The QA/QC Lead Discipline Engineer / Category I Supervisor ensures that approved Random Sample Identification Lists are distributed to the:

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QA/QC Reinspection Engineering Supervisor 6.0 ATTACHMENTS 6.1 Randon Sample Identification List Form (Sample and Instruction) w I

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' RANDOM' SAMPLE' IDENTIFICATION-LIST COMANCHE PEAK RESPONSE Tent (1)

RANDOM SAMPLE 10ENTIFICATION POPt,tATION NAME:

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INSTRUCTIONS TO COMPLETE FORM CPP-006.1

" RANDOM SAMPLE IDENTIFICATION LIST" The Preparer enters:

(1)

"First" or "Second" as applicable.

(2) The population name.

(3) Name as preparer and date.

(4) The sample number of the item and the corresponding randem/ sequential number of each item which comprises the sample as established in Section 5.1.

NOTE:

For second random samples, determine whether the randomly selected item is or is not required for safe shutdown (refer to Section 5.2).

Include each item which is required for safe shutdown and determined to be in the first randomly selected sample.

In order to attain the required sample size (refer to Table 5.1-1),

list additional items in the same population required for safe shutdown and discount any other item.

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Continue to list / discount items until the necessary sample size is established.

(5) The appropriate description of each randomly selected item.

(6)

"Y" (Yes) or "N" (No) to indicate whether the randomly selected item is safety related, constructed, and QC accepted.

(7)

"Y" (Yes) or "N" (No) after verifying, by examination, that the randomly selected item is (in) accessible.

NOTE: When verification of accessibility is not performed, enter "N/A" (not applicable) and provide justification for not performing the verification in the conuments portion of the form.

(8) As applicable, the Verification Package number (refer to Reference 3.4).

Otherwise enter "N/A" to indicate not applicable.

(9) Justification when "N" or "N/A" is indicated, e.g.,

the item is embedded in....,

etc.

In addition, summarize the basis and the results of the accessibility review.

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Attechasnt 6.1 CPP-006 Revision: 1 The QA/QC Lead Discipline Engineer / Category I Supervisor reviews Random f

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Sample, Identification Lists to ensure that they are complete, accurate, provide clear and reasonable justification as' required, and are otherwise consistent with the requirements of this procedure. Upon the completion of a satisfactory review, the reviewer:

(10) Signs and dates the form.

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