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| number = ML20058K798 | | number = ML20058K798 | ||
| issue date = 01/29/1975 | | issue date = 01/29/1975 | ||
| title = AO 75-3:on 750128,both Unit 2 Safety Injection Pumps Incapable of Starting on Automatic SI Signal from Approx 0900 to 100 | | title = AO 75-3:on 750128,both Unit 2 Safety Injection Pumps Incapable of Starting on Automatic SI Signal from Approx 0900 to 100 H | ||
| author name = Clarity R | | author name = Clarity R | ||
| author affiliation = NORTHERN STATES POWER CO. | | author affiliation = NORTHERN STATES POWER CO. | ||
| Line 16: | Line 16: | ||
=Text= | =Text= | ||
{{#Wiki_filter:_ | {{#Wiki_filter:_ | ||
s | s | ||
. - + . - | . - +. - | ||
Number 22 SI pump was racked out while a leak in the oil cooler was being repairec. humrer 21 SI prep vae tested for operability prior to r:chinr | a REPORT OF ABNOR'LAL GCCURRE"CE 20. 75-3 On January 28, 1975, both Unit 2 Safety Injection Punps vere incapable of starting on :n autcratic SI cign:1 from appronizately 03C0 to 1100. | ||
out .sunber 22. However, frc= 0900 to 1100, Train A of the Safeguards Logic was under test as per conthly Surveillance Test STP-1032A, chich would have pr2 vented a Train A Saf ety Ejection actuctien. | T!.e unit was operating at about 73% power thrcughout this time period. | ||
in tnis surveillance test could have initiated a Train A Safety Injection by sinply pushing the test relay reset butten en the control ranel. The operator was aware of the f act. | Number 22 SI pump was racked out while a leak in the oil cooler was being repairec. humrer 21 SI prep vae tested for operability prior to r:chinr out.sunber 22. | ||
9102140414 750129 CF | However, frc= 0900 to 1100, Train A of the Safeguards Logic was under test as per conthly Surveillance Test STP-1032A, chich would have pr2 vented a Train A Saf ety Ejection actuctien. | ||
l Throughout this time, the Centrol Roo: cperator rho was particiratine, in tnis surveillance test could have initiated a Train A Safety Injection by sinply pushing the test relay reset butten en the control ranel. | |||
The operator was aware of the f act. | |||
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Latest revision as of 08:23, 17 December 2024
| ML20058K798 | |
| Person / Time | |
|---|---|
| Site: | Monticello |
| Issue date: | 01/29/1975 |
| From: | Clarity R NORTHERN STATES POWER CO. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 75-3, NUDOCS 9102140414 | |
| Download: ML20058K798 (2) | |
Text
_
s
. - +. -
a REPORT OF ABNOR'LAL GCCURRE"CE 20. 75-3 On January 28, 1975, both Unit 2 Safety Injection Punps vere incapable of starting on :n autcratic SI cign:1 from appronizately 03C0 to 1100.
T!.e unit was operating at about 73% power thrcughout this time period.
Number 22 SI pump was racked out while a leak in the oil cooler was being repairec. humrer 21 SI prep vae tested for operability prior to r:chinr out.sunber 22.
However, frc= 0900 to 1100, Train A of the Safeguards Logic was under test as per conthly Surveillance Test STP-1032A, chich would have pr2 vented a Train A Saf ety Ejection actuctien.
l Throughout this time, the Centrol Roo: cperator rho was particiratine, in tnis surveillance test could have initiated a Train A Safety Injection by sinply pushing the test relay reset butten en the control ranel.
The operator was aware of the f act.
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