ML19206B147
| ML19206B147 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 09/21/1977 |
| From: | Herbein J Metropolitan Edison Co |
| To: | Grier B NRC Office of Inspection & Enforcement (IE Region I) |
| Shared Package | |
| ML19206B146 | List: |
| References | |
| GQL 1290, GQL-1290, NUDOCS 7905070478 | |
| Download: ML19206B147 (2) | |
Text
{{#Wiki_filter:. '*~ + " yg a, 7 m,. y~. a ._m / / / METROPOLITAN EDISON COMPANY sussicuar cr cenenst rusuc ununes caapcaancs ' CST CFFICE BOX 542 REACING. PENNSYLVANI A 196Q3 , T1ELEPHCNE 215 - 929-M September 21, 1977 GOL 1290 Mr. 3. H. Grier, Director U. S. Nuclear Regulatory Cc==issics Office of Inspection and Enforcement Region I 631 park Avenue King af Prussia, Pennsylvania 19hC6 fear Sir: Three Mile Islan:1 Nuclear Statica Unit 2 (SI-2) License No. CFFR-66 Dcchet No. 50-320 3uilding Spray ?=p Head Curves Cn August 22, 1977,.5. L. Ha rev of ycur office was verbally notified of a situatien which Metropclitan Edisen Cc=pany censidered to be repcrtable in acecrdance with the require =ents of 10CyE50.55(e). This letter censtitutes l the required thirty-day fellev-up letter. I I l Descrittien n l During the course of obtaining pu=p head curves fer the TMI-2 3uilding Spray Syste= ?=ps, it was disecvered that the 3 pu=p did not =eet the pu=p head curve supplied by the vender, 3&'i Canada. Measured pu=p head was abcut 205 belev the -aaufacturer 's curves. Preble=s have been experienced with the A l 3cilding Spray ?mp Meter, therefore, no pu=p head curve has yet been rm in the field. The vender was called to the site to inspect the pu=ps and could l find nothing physically wrong with the pu=ps er their installation. I At the vendcr's request, both pu=ps vere disas:e= bled, and their rotating l elements vere returned to the =anufacturer. I Analysis of Safety I:nlications Had this cenditics gene undetected, cne of tvc pessible situations could have cccurred: a. The pu=ps vculd not develop sufficient head to reach the building spray heade. b. The pu=ps vculd develop sufficient head to reach the building spray header, however, it veuld be at a reduced flev. i e f) ~ (. O* ci u. 4' e
P ~ t ,.g (. .t. 3. H. Grier, Directer Sept e=ber 21 1977 GQL 1290 Analysis of Safety Inclicaticns (continued) Neither of these pcssibilities could have occur ed due to the thoroug. ness h of the Startup sad Test Program which requires pu=p head crve develop =ent en sit e. For this reasen, this incident could not have developed into a situation which veuld have prevented the safe shutdevn of the unit nor would there have been an adverse effect en the health or safety of the public or the unit staff. Corrective Action The pt7 rotating ele =ents have been returned to the vender for retesting in the vender's test leep. Sese tests shculd re-veriff the data obtained in the field. Depending en the results of these tests, several optiens are avad'stble includ**g revised calculations to justiff the use of these pu=ps at red.uced head er =cdificatien of the rotating asse=blies to obtain the higher head. 3abecch & 'Jilecx estir.ates that both Building Spray Pu=ps vill be ret =ned to the site by the end of Septe@c.r, 1977 unless i=peller rework is required. If i=peller rework is necessary an additicnal veek's delay per pt7 can be expected. Infer =atien and doci:=entation associated with this incident v4 be available en site fer your reviev. V. tr-curs j '-{ J. G. Eerbein Vice P esident JGE:J?.S:dk" ca-N st Volgenau, Director N Office of Inspection and E=ferce=ent U. S. Nuclear F.egulatory Cc==issics
- 4ashington, D. C.
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