ML20202J393
| ML20202J393 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 01/30/1986 |
| From: | Hansel J, Ross G EVALUATION RESEARCH CORP. |
| To: | |
| Shared Package | |
| ML20202J051 | List:
|
| References | |
| CPP-006, CPP-6, NUDOCS 8607170073 | |
| Download: ML20202J393 (10) | |
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O EVALUATION RESEARCH CORPORATION
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COMANCHE PEAK RESPONSE TEAM PROJECT PROCEDURE FOR QA/QC ISSUE-SPECIFIC ACTION PLANS PROCEDURE NO: CPP-006 C0\~R0__D C03Y REVISION: 2 CONTROL NO.3 Fool ISSUE DATE: 01/30/86 SAMPLE SELECTION PREPARED BY: DATE: b h APPROVED BY: d/. DATE: /.fd-g[
GN-SITE QA REPRESENTATIVE APPROVED BY: 2M' DATE: / 3d 8 QA REVIEW TEAM LEADER / /
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8607170073 860711 PDR ADOCK 0500044S A PDR I
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CPP-006
. Ravisien: 2
') 1.0 PURPOSE (G This procedure describes the method used to randomly select items and 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 final QC accepted at Comanche Peak Units 1, 2, and areas comon to both units.
3.0 REFERENCES
3.1 CPP-005, " Establishing Populations."
3.2 CPRT Program Plan, Appendix D. "CPRT Sampling Approach, Applications, and Guidelines."
3.3 CPP-012. "QA/QC Interface with Constructor and TUGCO."
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: A second random sample, as defined in this procedure, is not required by ISAPs VII.a and VII.b.
4.1 Responsibilities 4.1.1 OA/QC Discipline Engineers / Issue Coordinators The QA/QC Discipline Engineers / Issue Coordinators select the random samples and prepare the Random Sample Identification List.
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CPP-006
, Rsvision: 2 4.1.2 QA/QC Lead Discipline Engineers / Hardware Issues O Supervisor l
The QA/QC Lead Discipline Engineers / Hardware Issues Supervisor review and approve Random Sample Identification Lists.
Moreover, the QA/QC Lead Discipline Engineers / Hardware Issues Coordinator ensure the distribution of approved Random Sample Identification Lists to the required personnel.
4.1.3 QA/QC Inspectors QA/QC Inspectors assist in the process of determining 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, ERC Management Program Plan, and the applicable Issue-Specific Action Plan (s).
O Where an activity is designated as the responsibility of a QA/QC Lead Discipline Engineer / Hardware Issue Supervisor, or higher, it may be dalegated by that individual to an l
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 First Random Sample - A selection of population items or work activities in which each item in the population has an equal chance of being selected.
4.4.2 Second Random Sample - A selection of population items or work activities from the safe shutdown systems or, for populations such as concrete which do not directly contain items in the safe shutdown systems, a selection of items or work activities which support those systems, or are in locations where their failure could adversely impact those systems.
4.4.3 Accessible Sample Item - An item which can be reinspected without invalidating any previously O. 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.
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l CPP-006 Rsvicion: 2
[~ 5.0 PROCEDURE 5.1 Random Sample Selection Upon completion of the Population Items List in accordance with Reference 3.1, the QA/QC Discipline Engineers select random samples as follows. In addition, Issue Coordinators select 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 Discount the number of items in the population which are unrelated to safety, incomplete, and/or unaccepted by QC. The number of remaining items is the estimated population size.
5.1.3 Use Table 5.1-1 to determine the minimum sample size which corresponds to the estimated population size.
Reference 3.2 establishes minimum sample sizes.
NOTE: Select more than tne minimum number of g-~s sample items in the event some are
() determined later to be inaccessible.
TABLE 5.1-1 SAMPLE SIZE FOR POPULATIONS MINIMUM RANDOM POPULATION SIZE SMHPLE SIZE
- 01-45 all 46-100 45 101-or more 60 5.1.4 Select the particular table of random digits in accordance with instructions in "A Million Random Digits,"** then place a decimal point in front of each set of random digits and multiply it by the population size. Use 5 random digits for populations comprised of 10,000 items or less. Otherwise, use 10 random digits.
- For the second random sample (refer to Section 5.2), include those O items from the first randomly selected sample that are required for safe shutdown.
- Rand Corporation 4
CPP-006
, Ravision: 2
)
(T 5.1.5 Drop the decimal portion of the product and add one.
s_ / The resultant random number will be the same as the previously assigned sequential number of an item (refer )
to Paragraph 5.1.1), thereby randomly selecting the 1 item.
Example: Generate a sample of 60 items from a l population of size 900.
Sample Random Population Random Number Digits Size Number 1 = .04146 x 900 = 37.314 = 37 + 1 = 38 2 = .23432 x 900 = 210.888 = 210 + 1 = 211 3 = .74381 x 900 = 669.429 = 669 + 1 = 670
() 75 = .65339 x 900 = 588.051 = 588 + 1 - 589 l 5.1.6 Confirm that each randomly selected item is complete. l 1.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, etc., in order to perform reinspections, Inspectors initiate Requests for Equipment / Services in accordance with Reference 3.3 l 5.1.7 Should an item not meet the criteria in Paragraph j 5.1.6, the next random number is generated and another item is selected.
5.2 Second Random Sample As required by ISAP VII.c, a second random sample will be selected from that portion of the population characterized as
, being required for safe shutdown.
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- O * "A Million Random Digits," Rand Corporation, page 355.
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CPP-006 Revision: 2 Items identified in the first random sample that are required O- for safe shutdown shall be included in the second random sample.
The QA/QC Discipline Engineers / Issue Coordinators select the second random sample according to the procedure in Section 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 REQUIRED FOR SAFE SHUTDOWN Auxiliary Feedwater System (AFWS)
Atmospheric Steam Relief Valves (PORV's)
Chemical and Volume Control System (CVCS)
Residual Heat Removal System (RHRS)
Pressurizer Pressure Control During RCS Depressurization Station Service Water System (SSWS)
Component Cooling Water System (CCWS)
Onsite Power Systems (Diesels, D. C.)
O- 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 Preparation, Review, and Approval The QA/QC Discipline Engineers / Issue Coordinators document the selection of the random samples by completing the Random Sample Identification List in accordance with Attachment 6.1.
Subsequently, the QA/QC Lead Discipline Engineer / Hardware Issues Supervisor reviews and l approves complete Random Sample Identification Lists in accordance with Attachment 6.1.
5.3.2 Distribution and Control The QA/QC Lead Discipline Engineer / Hardware Issues l Supervisor ensures that approved Random Sample Identification Lists are distributed to the:
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CPP-006 f .
Revision: 2 l-l QA/QC Records Administrator (File Location J
[ISAP Number]-4).
QA/QC Reinspection Engineering Supervisor.
. 6.0 ATTACHMENTS l 6.1 Random Sample Identification List Form (Sample and '
i Instruction) i 1
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Attachm2nt 6.1 CPP-006 Revision: 2 Page 1 of 3 g3 k.
RANDOM SAMPLE IDENTIFICATION LIST COMANCHE PEAK RESPONSE TEN 1 (1) RAND 0M SAMPLE IDENTIFICATION POPULATION NAME: (2)
(3) DATE: (3)
PREPARED BY:
f}A/DC DISCIPLINE ENGINEER R P DESCRIPTION ACCESS COMENTS S$L f0P (g N (4) (5) (6) (7) (8) (9) (10) 9
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(11) DATE: (11) p APPROVED BY:
QA/QC LEAD DISCIPLINE ENGINEER CPP-006.1 Revision 1
Attachmant 6.1
. CPP-006 Revision: 2 INSTRUCTIONS TO COMPLETE f~'/}
s_s 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.
j (4) The sample number of the item, e.g., 1,2,3, etc.
l (5) The corresponding random number of each item which comprises l 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
'f s size (refer to Table 5.1-1), list additional items
() in the same population required for safe shutdown and discount any other item. Continue to list /
discount items until the necessary sample size is established.
(6) The appropriate. description cf each randomly selected item.
(7) "Y" (Yes) or "N" (No) to indicate whether the randomly selected item is safety related, constructed, and QC accepted.
(8) "Y" (Yes) or "N" (No) af ter 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 comments portion of the form.
(9) As applicable, the Verification Package number (refer to Reference 3.4). Otherwise enter "N/A" to indicate not applicable.
(10) 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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Attachm3nt 6.1
, CPP-006 Revision: 2 g The QA/QC Lead Discipline Engineer / Hardware Issues Supervisor reviews l Randon 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:
(11) Signs and dates the form.
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