ML19345A868
| ML19345A868 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 11/19/1980 |
| From: | Baynard P FLORIDA POWER CORP. |
| To: | Reid R Office of Nuclear Reactor Regulation |
| References | |
| 3-110-13, NUDOCS 8011250349 | |
| Download: ML19345A868 (4) | |
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,,j.; p Florida Power November 19, 1980f',"#
File:
3-0-3-a-7
- 3-110-13 Mr. Robert W. Reid Chief Operating Reactors Branch #4 U.S. Nuclear P,egulatory Commission Washington, DC 20555
SUBJECT:
Crystal River Unit 3 Docket No. 50-302 Operating License No. DPR-72 Decay Heat System Check Valve Information
Dear Mr. Reid:
On October 20, 1980, the B&W Regulatory Response Group met with the NRC Staff to discuss possible generic implications of a check valve failure that occurred at the Davis-Besse Plant of Toledo Edison Company.
On October 24, 1980, we received via telecopy, and responded tele-phone, to certain questions as they pertain to Crystal River Unit 3.
Florida Power Corporation offers the attached as written confirmation of that information.
Should you require additional infomation, please contact this office.
Very truly yours, FLORIDA POWER CORPORATION
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Patsy Y. Baynard Manager Nuclear Support Services Lobo (WO4)D-8-3 801 i n no M9 1
General Of fice 3201 in,rty.tourin street soutn. P O Box 14042, St Petersburg. Acrea 33733 813-566 5151
STATE OF FLORIDA COUNTY OF PINELLAS P. Y. Baynard states that she is the Manager, Nuclear Support Services Department of Florida Power Corpu.ation; that she is authorized on the part of said company to sign and file with the Nuclear Regulatory Com-mission the information attached hereto; and that all such statements made and matters set forth therein are true and correct to the best of her knowledge, information and belief.
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- V P. f." Baynard
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Subscribed and ; worn to before me, a Notary Public in and for the State and County above named, this 19th day of November 1980.
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NotaryPublic/
Notary Public, State of Florida at Large, My Commission Expires:
Juee 8, 1984 PYB/MNiNotary(DN-98)
FPC RESPONSE T0 fRC QUESTIONS
- ON SWING CHECK VALVE IN THE DECAY HEAT REMOVAL SYSTEM Question 1:
For each check valve, please indicate:
a.
Manufacturer b.
Model Number c.
Valve Type.
RESPONSE
a.
Crane Valve Companj.
b.
7154 -U-6 C.
c.
Swing Check Valve.
Question 2:
Dat si la,o official inspection of internals.
RESPONSE
No record of a visual inspection since the installation of the valve has been found.
Observation:
N/A Question 3:
Date of last individual hydrostatic test.
RESPONSE
No record of an individual hydrostatic test has been found.
Test Result:
N/A Question 4:
Date of last ISI/IST Operability (Stroke) Test.
RESPONSE
Februa ry 29, 1980.
Flow of 3,000 gallons per minute was veri fied.
Question 5:
For those configurations which have two check valves and one MOV in series, is the MOV normally opened or closed during plant operations?
RESPONSE
The MOV is a normally closed valve.
- Questions telecopied on October 24, 1980.
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Question 6:
Are the MOVs being cycled (either partial or full stroke) quarterly or has relief been sought in the ISI/IST Program to test during refueling outages?
RESPONSE
The MOVs are stroked every refueling outage and any outage for which we are in a cold shutdown mode for greater than 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> if the test has not been run in the last three months.
This is " accordance with Surveillance Proce-dure 435, " Valve Teiting During Cold Shutdown".
Question 7:
What provisions (either hardware or administrative) ar.
~'e re to preclude opening MOVs when there is reactor coolant pres-sure present on the high pressure side of the valve?
RESPONSE
Operations Procedure (0P) 404, " Operation of the Decay Heat Removal System", Section 4.3, provides an administrative lim-it to prevent opening the MOVs with reactor coolant pressur-izer pressure above '84 psig.
For valve testing, OP 209, J
" Plant Cooldown", 4.s applicable and cold shutdown is a pre-requisite, thereby obviating the possibility of having valves with full primary pressure on the high pressure side of the valve.
Question 8:
In the past, have val ves been known or found to lack i ntegrity?
RESPONSE
No.
Question 9:
Will plant modifications be necessary to accomplish individ-ual hydrostatic tests?
RESPONSE
Yes.
Pressure taps are present on the downstrean sides of the check valves, but the modification required will be the installation of piping isolation valves and instrumentation.
Question 10:
Is there a pressure indication on the low pressure side of either or both check valves?
Is there remote pressure i ndicat ion?
RESPONSE
There is pressure indication, gauge temporarily instailed on the upstream side of the outboard check valve be hat check valve and the MOV.
This was installed in a p< u sously existing vent and drain valve.
There is
,o remote pressure indication available.
Question 11:
What is the date of the next plant outage which would allow both visual inspection of valve internals as well as hydro-static test of each valve?
RESPONSE
Fall of 1981.
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