ML20245K558
| ML20245K558 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 06/28/1989 |
| From: | HOUSTON LIGHTING & POWER CO. |
| To: | |
| Shared Package | |
| ML20245K549 | List: |
| References | |
| NUDOCS 8907050167 | |
| Download: ML20245K558 (2) | |
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a ATTACHMENT 2 PROPOSED TECHNICAL SPECIFICATION CHANGE l
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CONTAINMENT SYSTEMS I
CONTAINMENT STRUCTURAL INTEGRITY
{JtilTING CLND]Il0LEQllfPERAT10N
- 3. 6.1. 6 The structural integrity of the containment shall be maintained at a level consistent with the acceptance criteria in Specification 4.6.1.6.
APPLICABILITY: MODES 1, 2, 3, and 4.
ACTION:
With more' than one tendon with an observed lift-off force between a.
the predicted lower limit and 90% of the predicted lower limit or with one tendon below 90% of the predicted lower limit, restore the tendon (s) to the required level of integrity within 15 days and perform an engineering evaluation of the containment.and provide a Special Report to the Commission within 30 days in accordance with Specification 6.9.2 or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />' and in COLD SHUTOOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
b.
With any abnormal degradation of the structural integrity other than ACTION a. at a level below the acceptance criteria of Specification 4.6.1.6, restore the containment to the required level of integrity within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> and perform an engineering evaluation of the contain-ment and provide a Special Report to the Commission within 15 days in accordance with Specification 6.9.2 or be in at least HOT STANDBY within the_next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTOOWN within the followino 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.Jsod s&tt <ca. s4.a0 ia. Pund ando Z 6 werd46
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4.6.1.6.1 ontainment Tendons.
The containment tendons' structural integrity s 1all be demonstrated at the end of 1, 3, and 5 years following the initial containment structural integrity test and at 5 year intervals l
therea f ter.1 The tendons' structural integrity shall be demonstrated by:
Determining that a random but representative sample of at least 13 a.
tendons (4 inverted U and 9 hoop) each have an observed lift-off force within predicted limits for each.
For each subsequent inspec-tion, one tendon from each group may be kept unchanged to develop a history and to correlate the observed data.
If the observed lift-off force of any one tendon in the original sample population lies J
between,the predicted lower limit and 90% of the predicted lower limit, two tendons, one on each side of this tendon, should be checked for their lift-off forces.
If both of these adjacent tendons are found to be within their predicted limits, all three tendons should be restored to the required level of integrity. This single deficiency may be considered unique and accceptable. Unless there is abnormal degradation of the containment during the first three inspections, the sample population for subsequent inspections shall include at least 5 tendons (2 inverted U and 3 hoop);
SOUTH TEXAS - UNITS 1 & 2 3/4 6-9 i
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