ML20036B797
| ML20036B797 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 05/24/1993 |
| From: | DETROIT EDISON CO. |
| To: | |
| Shared Package | |
| ML20036B796 | List: |
| References | |
| NUDOCS 9306020348 | |
| Download: ML20036B797 (2) | |
Text
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Attachment t.o
- NRC-93-00614 Page 1 i
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r-Technical Specification Page Change
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9306020348 930524 PDR ADOCK 05000342 P
e C'ONTAINMENT SYSTEMS SURVtILLANCE REQUIREMENTS (Continued)
(c)
Dewpoint temperature sensors shall have an accuracy of il F or better over the dewpoint temperature range expected during the test *20 F and a repeatability of at least 10.5 F.
(d)
Pressure sensors should have a range such that Pa is between 25 and 75% of full scale. Accuracy shalT be at least 0.015% of full scale with resolution and repeatability of 0.001% of full scale.
(e)
The number and location of temperature and dewpoint sensors shall be determined prior to each Type A test based on a temperature survey of the containment.
(f)
A sufficient number of dry bulb temperature sensors must be functioning properly during the test such that no sensor contributes more than 10% to the calculated temperature.
l (g)
At least two-thirds of the dewpoint temperature sensors shall be functioning properly during the test. However, if data recorded over the last 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> indicate that dewpoint temperatures have stabilized and any changes are not of an order to cause error in leak rate calculations, then malfunction of any or all but three of the dewpoint sensors shall not require aborting the test.
(h)
At least one precision pressure gauge shall be functioning properly during the test.
(i)
Prior to each Type A test and following the failure of any sensor, an instrument error analysis shall be performed using the Instrument Selection Guide (ISG) formula of ANSI /ANS-56.8-1981. The ISG shall not exceed 0.25 L at the a
end of a test except as noted in (g) above.
r 8.
Three Type A Overall Integrated Containment Leakage Rate tests shall be conducted at 401 10 month intervals during shutdown at P
56.5 psig, during each 10-year service period. The third test of,eachsetshallbeconductedduringtheshutdownforthe10-year plant inservice inspection.
9.
If any periodic Type A test fails to meet 0.75 L, the test i
a schedule for subsequent Type A tests shall be reviewed and approved by the Commission.
If two consecutive Type A tests fail to meet 0.75 L, a type A test shall be performed at least every 18 months *unt!1twoconsecutiveTypeAtestsmeet0.75L,at l
a which time the above test schedule may be resumed.
- An exemption from the 18-month accelerated test frequency requirement l
incurred after the failure of the two successive Type A tests conducted during l
l the first and third refueling outages is allowed.
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FERMI - UNIT 2 3/4 6-5 Amendment No.
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