**NRC INSPECTION MANUAL** HICB

INSPECTION PROCEDURE 56700

CALIBRATION

PROGRAM APPLICABILITY: 2515

SALP FUNCTIONAL AREA: MAINTENANCE (MAINT)

56700‑01 INSPECTION OBJECTIVE

To ascertain whether the licensee has developed and implemented a
program for the calibration of plant instrumentation that is in
conformance with license requirements, technical specifications,
licensee commitments and industry guides and standards.[^1]

56700‑02 INSPECTION REQUIREMENTS

02.01 [Verification of Frequency of Calibration]{.underline}. Through
review of licensee records, verify that the frequency of calibration
specified in the technical specifications has been met for the following
systems:

a.  [Channel Functional Tests and Calibrations]{.underline}. Review
    frequency of calibration as specified in the technical
    specifications for 50% of the channel functional tests and channel
    calibration of instrumentation in the following systems:

    1.  Reactor protection

    2.  Emergency core cooling activation

    3.  Isolation activation (BWR)

b.  [Selected Systems]{.underline}. Review frequency of calibration as
    specified in the technical specifications for 20% of the
    instrumentation in each of the following systems:

    1.  Reactivity control

    2.  Plant auxiliary

    3.  Reactor coolant

    4.  Emergency core cooling (LWR)

    5.  Liner cooling (HTGR)

    6.  Containment

    7.  Electrical distribution

02.02 [Completed Test Documentation Review]{.underline}. Sample
completed test documentation from the systems of 02.01, above and
establish whether the following has occurred:

a.  The test documentation is complete.

b.  Acceptance criteria have been met.

c.  The proper, approved test procedure was used.

d.  For two systems, the personnel performing the procedure were
    properly qualified.

02.03 [Technical Content Review]{.underline}. Examine the technical
content of procedures utilized to conduct the following tests and
calibrations:

a.  Reactor protection system, one channel functional test.

b.  Isolation activation system, one channel functional test (BWR).

c.  Emergency core cooling activation system, one channel functional
    test.

d.  Reactor protection system, one channel calibration.

e.  Isolation activation system, one channel calibration (BWR).

f.  Emergency core cooling activation system, one channel calibration.

g.  Reactor protection system, one time response test.

h.  Isolation activation system, one time response test (BWR).

i.  Emergency core cooling activation system, one time response test.

j.  Calibration of one instrument each from three of the systems listed
    in 02.01b, above.

02.04 [Calibration of Components Not Addressed in Technical
Specifications]{.underline}. The licensee\'s system for calibration of
components associated with safety‑related systems or functions, but not
addressed in technical specifications, should be reviewed regarding the
following:

a.  Check if there is a backlog of past due calibrations.

b.  Sample 5 components used to make technical specification‑related
    measurements.

c.  Sample 5 components that provide automatic control or activation of
    a process, or that are used by an operator during normal operations
    or post‑accident conditions.

d.  For the components selected in 02.04b and 02.04c, above:

    1.  Verify that the range and accuracy of the component is
        consistent with its application and/or specified range and
        accuracy.

    2.  Verify that reviewed and approved procedures are available for
        calibration of the component.

e.  For three of the procedures identified in 02.04d2, above examine
    their technical content.

02.05 [Calibration Witnessing]{.underline}. By witnessing two components
actively undergoing calibration, verify that the procedures used have
been reviewed and approved and that the calibration is in accordance
with these procedures.

56700‑03 INSPECTION GUIDANCE

03.01 [Verification of Frequency of Calibration]{.underline}. No
inspection guidance provided.

03.02 [Completed Test Documentation Review]{.underline}

a.  The following characteristics indicate the test or calibration
    documentation is complete:

    1.  Prerequisites indicated as achieved and as‑found conditions
        recorded.

    2.  Procedural steps initialed or signed off and all necessary
        values entered. All attachment sheets included.

    3.  Post‑test/calibration reviews conducted.

    4.  Post‑test/calibration valve and switch lineups completed and
        as‑left conditions recorded.

    5.  Where components were found to be out of calibration, or where
        functional tests were unsatisfactory, do licensee procedures
        address the possible safety significance of the situation (i.e.,
        possible instances of out of specification conditions or periods
        of time where limiting conditions for operation were exceeded)?
        Do licensee procedures address the potential need for rework
        using recalibrated components? Do licensee procedures address
        potentially required reports under the provisions of 10 CFR
        50.73, Licensee Event Report System?

b.  No inspection guidance provided.

c.  No inspection guidance provided.

d.  ANSI N18.1 provides qualification standards for personnel conducting
    calibrations. Although such standards are typically referenced in
    technical specifications, inspectors should consult the FSAR for the
    facility under inspection to ascertain the licensee\'s commitment to
    training in this area.

03.03 &

03.04e Procedures should address the following criteria:

a.  Are limiting conditions for operation normally recognized and met
    during the procedure?

b.  Will calibration be to the accuracy required by technical
    specifications or made necessary by the application for which the
    component is utilized? Consider:

    1.  Tolerances of test instruments

    2.  Necessary corrections and signal compensation for elevation,
        temperature, etc.

    3.  Correctness of conversion factors

c.  Are the test instruments utilized referenced by serial number?

d.  Are proper controls placed on the processes by which components are
    removed and returned to service (e.g., tags, log entries, lineup
    sheets)? Are the valve and switch lineups correct?

e.  Are the points of signal insertion and signal readout specified?

f.  Are readings taken at selected cardinal points over the full
    operational range of the component?

g.  Are calibrations conducted at selected cardinal points over the full
    operational range of the component?

03.04 [Calibration of Components Not Addressed in Technical
Specifications]{.underline}. Technical specifications do not establish
requirements for calibration of all instruments that perform
safety‑related functions; however, a regulatory basis for this exists in
10 CFR 50, Appendix B, Section XII. Many local or remote indicating
instruments serve as the bases for assuring that a system or subsystem
is in conformance with the limiting condition for operation (LCO) of
technical specifications. For example, the LCO for the borated water
storage tank at a PWR establishes minimum limits for solution
temperature and tank volume. Typically, the instruments that provide
these indications are not identified in the technical specifications for
calibration at a specific periodicity. Therefore, the licensee should
develop a plan and schedule for such calibrations and incorporate this
program into plant procedures.

56700‑04 REFERENCES

(Plant specific) facility operating license

Technical Specifications of the facility operating license

ANSI N18.1

END

[^1]: This inspection procedure does not address the calibration of
    measuring and test equipment against recognized standards.