ML19318A910: Difference between revisions
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Eg] j During surveillence testir.g of AERG pump B-B, the pump _ failed duc to | Eg] j During surveillence testir.g of AERG pump B-B, the pump _ failed duc to E E) L low differential g essure. A computation errer caused the failure to go_ | ||
I' M L".99 ti.cc.d.39d unit 1 late _r ente _ red j!o'de ,4 This,_rcsulte'd in cniv,_ coa _ __ | |||
E E) L low differential g essure. A computation errer caused the failure to go_ | |||
I' M L".99 ti.cc.d.39d unit 1 late _r ente _ red j!o'de ,4 | |||
This,_rcsulte'd in cniv,_ coa _ __ | |||
pq--) [ operable AERW loop (2 required) while the unit was in Mode 4. | pq--) [ operable AERW loop (2 required) while the unit was in Mode 4. | ||
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Line 57: | Line 47: | ||
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Line 82: | Line 65: | ||
[g- [ pressure. Personnel . shall be re-instructed in performance. The I T-~) l instruecntation involved was recalibrated and the_ pump retc.ated satig.f_pc , | [g- [ pressure. Personnel . shall be re-instructed in performance. The I T-~) l instruecntation involved was recalibrated and the_ pump retc.ated satig.f_pc , | ||
[, ! .j j torily. The problect was with the instrumentation and not with the pump. | [, ! .j j torily. The problect was with the instrumentation and not with the pump. | ||
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* T nn:nscc Valley Authority Sequoyah Nuclear Plant 2 | |||
T nn:nscc Valley Authority Sequoyah Nuclear Plant 2 | |||
LER SUPPLEMENTAL INTOPJiATION SQRO-50-327/ 8075 Technical Specificaton Involved 3.7.4.2 and 4.0.5 Peported Under Technical Specification 6.9.1.12.b Date of occurrence: 5/24/80 Time of ]ccurrenec: 2356 CST Identificatien and Description of Occurrence A surveillance instruction (SI74) en Auxiliary Essential Raw Cooling (AERCW) pump E-B was performed on 5/24/E0 prior to entry into !fode 4. | LER SUPPLEMENTAL INTOPJiATION SQRO-50-327/ 8075 Technical Specificaton Involved 3.7.4.2 and 4.0.5 Peported Under Technical Specification 6.9.1.12.b Date of occurrence: 5/24/80 Time of ]ccurrenec: 2356 CST Identificatien and Description of Occurrence A surveillance instruction (SI74) en Auxiliary Essential Raw Cooling (AERCW) pump E-B was performed on 5/24/E0 prior to entry into !fode 4. | ||
The unit operator made a computation error in calculating the differen-tial Treasure and erroncously passed the purp. Therefore, unit i entered Mede 4 at 2356 CST on 5/24/60 with SR 4.0.5 and LCO 3.7.4.2 unsatisfied. AERCW pump D-B nctually ' ailed due to low differential prescure. The purp was discovered to not meet the acceptance criteria during the review process or. 6/5/80 at 1100 CST. | The unit operator made a computation error in calculating the differen-tial Treasure and erroncously passed the purp. Therefore, unit i entered Mede 4 at 2356 CST on 5/24/60 with SR 4.0.5 and LCO 3.7.4.2 unsatisfied. AERCW pump D-B nctually ' ailed due to low differential prescure. The purp was discovered to not meet the acceptance criteria during the review process or. 6/5/80 at 1100 CST. |
Latest revision as of 07:24, 1 February 2020
ML19318A910 | |
Person / Time | |
---|---|
Site: | Sequoyah |
Issue date: | 06/17/1980 |
From: | Sullivan J TENNESSEE VALLEY AUTHORITY |
To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
Shared Package | |
ML19318A906 | List: |
References | |
LER-80-075-01T, LER-80-75-1T, NUDOCS 8006240369 | |
Download: ML19318A910 (2) | |
Text
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Eg] j During surveillence testir.g of AERG pump B-B, the pump _ failed duc to E E) L low differential g essure. A computation errer caused the failure to go_
I' M L".99 ti.cc.d.39d unit 1 late _r ente _ red j!o'de ,4 This,_rcsulte'd in cniv,_ coa _ __
pq--) [ operable AERW loop (2 required) while the unit was in Mode 4.
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[Ti r] [ Event was caused by an personnel error in calculating pump differential
[g- [ pressure. Personnel . shall be re-instructed in performance. The I T-~) l instruecntation involved was recalibrated and the_ pump retc.ated satig.f_pc ,
[, ! .j j torily. The problect was with the instrumentation and not with the pump.
E. E.3 ! ,
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(N I'. "'3 d c..m , n . .e .. . . .. G
[-[7 LBJCg [j,1 ol 7! N/A __J LBj@l Engineering review
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- T nn:nscc Valley Authority Sequoyah Nuclear Plant 2
LER SUPPLEMENTAL INTOPJiATION SQRO-50-327/ 8075 Technical Specificaton Involved 3.7.4.2 and 4.0.5 Peported Under Technical Specification 6.9.1.12.b Date of occurrence: 5/24/80 Time of ]ccurrenec: 2356 CST Identificatien and Description of Occurrence A surveillance instruction (SI74) en Auxiliary Essential Raw Cooling (AERCW) pump E-B was performed on 5/24/E0 prior to entry into !fode 4.
The unit operator made a computation error in calculating the differen-tial Treasure and erroncously passed the purp. Therefore, unit i entered Mede 4 at 2356 CST on 5/24/60 with SR 4.0.5 and LCO 3.7.4.2 unsatisfied. AERCW pump D-B nctually ' ailed due to low differential prescure. The purp was discovered to not meet the acceptance criteria during the review process or. 6/5/80 at 1100 CST.
Conditions Prior to occurrence Unit 1 in Mode 5.
Actions cpecified in the Technical Specifications Surveillnnce Requiremento not met due to inoperab1_e ecuipment. . , _ ,
Unit 1 be in cold shutdevn (Mode 5) within 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
Apparent Cause of Occurrence Computational error.
Analysis of Occurrence There was no hazard to the public health and safety. ,
Corrective Action Reinstruct operating personnel. It is suspected that a problem exists with installed inotrumentation cnd not with the pump. The instrumentation was recalibrated and SI rerun and pump B-B passed en 6/9/80.
Failure Data None