3F0689-07, Application for Amend to License DPR-72,consisting of Tech Spec Change Request 168,adding New Spec to Address Use of Hydrogen Purge Valves for Depressurization

Application for Amend to License DPR-72,consisting of Tech Spec Change Request 168,adding New Spec to Address Use of Hydrogen Purge Valves for Depressurization

ML20245D244
Person / Time
Site:	Crystal River
Issue date:	06/12/1989
From:	Boldt G FLORIDA POWER CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20245D246	List: 3F0689-07, Application for Amend to License DPR-72,consisting of Tech Spec Change Request 168,adding New Spec to Address Use of Hydrogen Purge Valves for Depressurization ML20245D251
References
3F0689-07, 3F689-7, NUDOCS 8906270027
Download: ML20245D244 (6)

Text

. _ _ _ - _ . ._

ee (v e 8U I

?' E eee Power C 0 A P o R A1iO N June 12, 1989 3F0689-07 U.S. Nuclear Regtlatory Commission Attention: Document Control Desk Washington, D.C. 20555 <

Subject:

Crystal River Unit 3 Docket No. 50-302 ,

j Operating License No. DPR-72 ,

Tecimical Specification Change Request No.168 Hydrogen Purge Valves i

Dear Sir:

Florida Power Corporation (FPC) hereby submits Technical Specification Change Request No. (TSCRN) 168, requesting amendment to Appendix A of Operating License No. DPR-72. As part of this request, the proposed Technical Specification page for Appendix A and associated bases are provided.

This proposal adds a new specification to address the use of the hydrogen purge valves for depressurization, and is submitted in accordance with NRC's request.

This new specification ensures limited use of the hydrogen purge valves.

FPC requests this amendment be implemented within 30 days after issuance to allow for procedure revisions and training.

If you have any questions, please contact this office.

l Sincerely, de Gary L Boldt, Vice President Nucle r Production l JBC:GLB:wla xc: Regional Administrator, Region II Senior Resident Inspector '

8906270027 890612 2 ;

PDR ADOCK 0500 p _

POST OFFICE BOX 219

• CRYSTAL RIVER, FLORIDA 326294219 * (904) 795-6486

' A Florida Progress Company.

1 ,

.~  !

1

. j STATE OF FLORIDA

COUNTY OF CITRUS

^

Gary L. Boldt' states that he is the.Vice President, Nuclear. Production for Florida Power Corporation; that he is authorized on'the part of i said company to sign and file with the Nuclear Regulatory Commission the' information attached hereto; and that all such statements made.

J and matters set' forth therein are true ar' correct to the' best of "

his knowledge, information, and belief.

1 i

)

[ Gary L/Boldt, Vice President i' l Nuclear Production Subscribed and sworn to before me, a Notary Public in and for the State and County above named, this 12th day of June, 1989.

)

3 J

1ry Public MSU ~

l Notary Public State of Florida at Large I My Commission Expires:- June 21, 1991 ,

i i

l 1

4 UNITED STATES'0F AMERICA

. NUCLEAR REGULATORY COMMISSION l l

IN THE MATTER ) 1

) . DOCKET No. 50-302 FLORIDA POWER CORPORATION )

CERTIFICATE OF SERVICE j Gary L. Boldt. deposes and says that the following has been served on j the Designated State Representative and Chief Executive of Citrus County, Florida, by deposit- in the United States mail, addressed as ,

1 follows:

Chairman, Administrator Board of County Commissioners Radiological Health Services l of Citrus County Department of Health and .J Citrus County Courthouse Rehabilitative Services j Inverness, FL 32650 1323 Winewood Blvd. 1 Tallahassee', FL 32301 J A copy of Technical Specification Change Request No. 168, Revision 0, i requesting Amendment to Appendix A of Operating Licensing No. DPR-72.

FLORIDA POWER CORPORATION )

i Gary L.j%oldt, Vice President Nuclear Production SWORN TO AND SUBSCRIBED BEFORE ME THIS 12th DAY OF JUNE 1989.

r

4~ "-

~

ry Public V Notary Public, State of Florida at Large 'I My Commission Expires: June 21, 1991 s

.I J j

g, ,

L 1

c'  !

. i j

F FLORIDA ~ POWER CORPORATION CRYSTALtRIVER UNIT 3' i

DOCKET NO. 50/302 LICENSE NO. DPR  !

REQUEST NO.-168 o HYDROGEN PURGE VALVES J l LICENSE DOCUMENT INVOLVED: Technical Specifications-l PORTIONS: 3.6.4.3 4.6.4.3.1~

4.6.4.3.2

. DESCRIPTION OF. REQUEST:

This submittal adds a new specification to address the use of the. hydrogen d purge valves for depressurization. 5 REASON FOR REQUEST:

The basic function of the-six inch hydrogen purge valves (LRV-'70,71',72 and -

73)- is to provide containment isolation for the hydrogen purge system. 1 The installed configuration of these valves is two A and B train valves in  :

. series,' in paralle1 ~.with two A ' and. B train valves in series. .This- 1 arrangement provides a single failure proof.- configuration . for. hydrogen purging during a postulated loss of coolant accident. Each of these valves j

L are also powered from separate vital buses (which are battery backed). 1 Therefore, in the event -of a loss of AC' power, DC power is 'available to l operate the hydrogen. purge valves. Because they were not automatically _ i actuated by the engineered safeguards features' actuation : systems (ESFAS),:

they could not be opened during power operations.without prior NRC approval to depressurize the containment. A modification was performed to actuate LRV-70, 71, 72 'and 73 on an ESFAS signal . to allow. containment depressurization during power operations. They are also 'actuat'ed by a high radiation signal to insure that Crystal River Unit 3 does not challenge the. ,

radioactive effluent discharge limits' established by'10CFR100. '

The containment purge valves (AHV-1A, IB, IC and 'lD)would normally be used for depressurization during power operation. . However, detailed analysis - -i of the purge valves has failed to conclusively. demonstrate their ability. l to close'during a large break loss of coolant accident in time to prevent  :

offsite dose limits from exceeding 10CFR100 limits. Therefore, these  ;

valves are. required to be secured in the closed position during MODES 1,2,3,and 4. '

The hydrogen purge valves will close within two. seconds. against a differential pressure of 80 psi at an operating temperature'of 670 degrees-F. These conditions meet or exceed the requirements for the containment purge valves 'as stipulated in paragraph 5.3.3 of the-Crystal ~ River Unit 3 FSAR. '

)

I 1

, To provide more standard controls, the NRC staff requested FPC submit a technical specification change request to address the use of the hydrogen purge valves for depressurization.

EVALUATION OF REQUEST:

This submittal is consistent with current Standard Technical Specification 3.6.1.8.b(NUREG-0452). The new specification 3.6.4.3 will ensure limited use of the hydrogen purge valves. As such it represents an additional restriction on plant operations. This restriction is necessary to ensure time periods with direct access from the containment atmosphere to the outside atmosphere are minimized.

I j

l SH0LLY EVALUATION OF REQUEST:

Florida Power Corporation (FPC) proposes the addition of a new specification to '

address the use of hydrogen purge valves for depressurization does not involve a significant' hazard consideration. The new specification will ensure limited use of the hydrogen purge valves and as such, represents _ an additional restriction on plant operation.

Based on the above, FPC concludes this change will not:

1. Involve a significant increase in the probability or consequence of an accident previously evaluated because this change provides assurance that these valves are capable of closing during a LOCA or steam line break accident within containment. Performance of the surveillance requirements will demonstrate valve operability. Therefore, the site boundary dose guideline values of 10CFR Part 100 would not be exceeded in the event of an accident during containment purging operation.

2. Create the possibility of a new or different kind of accident from any accident previously evaluated because the proposed change introduces no new mode of plant operation nor does it require a physical modification to the i plant.

I

3. Involve a significant reduction in the margin of safety because this change j adds a restriction on plant operation to ensure time periods with direct s access from containment atmosphere to the outside atmosphere are minimized.

1 l

l l

i l

I L _ -- - --- _ - _ ----------------_ _ -