ML20045B532
| ML20045B532 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 06/10/1993 |
| From: | George Thomas DUQUESNE LIGHT CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| IEB-93-002, IEB-93-2, NUDOCS 9306180045 | |
| Download: ML20045B532 (7) | |
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a Eteaver t' alley Power Station Shippingport. P A 15077-0004 (412) 3934 206 1412) 643-8069 F AX GEORGE S. THOfAAS Divesion Vice President Nudear Service 6 Nudear Power Dimion June 10, 1993 U.
S.
Nuclear Regulatory Commission Attn:
Document Control Desk Washington, DC 20555
Subject:
Beaver Valley Power Station, Unit No. 1 and No. 2 BV-1 Docket No. 50-334, License No. DPR-66 BV-2 Docket No. 50-412, License No. NPF-73 Response to NRC Bulletin No. 93-02:
Debris Plugging of Emergency Core Cooling Suction Strainers Attached is the Duquesne Light Company (DLC) response to NRC Bulletin No.
93-02,
" Debris Plugging of Emergency Core Cooling Suction Strainers."
The enclosure provides the status of actions taken at Beaver. Valley Power Station (BVPS) Unit No. 1 and No. 2 to meet the requested actions contained in the bulletin and meets the reporting requirements that were specified for all action addressees.
If you have any questions concerning this
- response, please contact Drexel Williams at (412) 393-5226.
Sincerely, AYCD Ng George S. Thomas Attachment cc:
Mr. L.
W. Rossbach, Sr. Resident Inspector Mr. T.
T. Martin, NRC Region I Administrator Mr.
G.
E.
Edison, Project Manager Mr. M.
L. Bowling (VEPCO) k 1700ac I
9306180045 930610 7
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PDR ADDCK 05000334 b4 s
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PDR g
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s COMMONWEALTH OF PENNSYLVANIA)
) SS:
COUNTY OF BEAVER
)
Subject:
Beaver Valley Power Station, Unit No. 1 and No. 2 BV-1 Docket No. 50-334, License No. DPR-66 BV-2 Docket No. 50-412, License No. NPF-73 Response to NRC Bulletin 93 Debris Plugging of Emergency Core Cooling Suction Strainers Before me,
the undersigned notary public, in and for the County and Commonwealth aforesaid, this day personally appeared George S.
- Thomas, to me known, who being duly sworn according to law, deposes and says that he is Division Vice President, Nuclear Services of the Nuclear Power Division, Duquesne Light Company, he is duly authorized to execute and file the foregoing submittal on behalf of said
- Company, and the statements set forth in the submittal are true and correct to the best of his knowledge, information and belief.
x ___ JV6_
y Georfe S.
Thomas J
Subscribed and sworn to before me on this /[ day ofb (&/ti, j
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lll" Notary Public tetanat Sed W4a FA FattyeMatary Pl+c Staxg:xm Ekwo. Eko.e County Idy Commssran Expres Sect. 26, d54 tAccer/ennsywane kuoam o: rtow l
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DUQUESNE LIGHT COMPANY
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Nuclear Power Division ATTACHMENT Response to NRC Bulletin 93 Debris Plucoina of Emeroency Core Coolino Suction Strainers Reouested Actioni Identify fibrous air filters or other temporary sources of fibrous material, not designed to withstand a LOCA, which are installed or stored in your primary containment.
BVPS Unit 1 It has been determined through design reviews that the only fibrous air filters permanently installed in primary containment were the Containment Iodine Filtration System pre-filters and HEPA filters (VS-FL-10, 11, 13 and 14), the Post DBA Hydrogen Control System sample filters (HY-FL-3A, 3B, 3C and 3D) and the Containment Instrument Air System filters (IA-FL-5A, 58,18A and 18B). No other temporary sources of fibrous material have been identified as being installed or stored in the primary containment.
BVPS Unit 2 It has been determined through design review that the only fibrous air filters permanently installed in the primary containment were the Containment Iodine filtration System pre-filters and HEPA filters (2HVR-FLTA 210A, 210B, 212A and 212B).
No other temporary sources of fibrous material have been identified as being installed or stored in the primary containment.
Reouested Actions Take any immediate compensatory measures which may be required to assure the functional capability of the ECCS.
BVPS Unit 1 The station was in a refueling outage (i.e., ECCS not required to be operable)-at the time the bulletin was issued. Thus, it was unnecessary to take any specific j
short term action to address ECCS operability because of this specific issue until a permanent correction could be implemented.
BVPS Unit 2 1
The design of the Containment Iodine Filtration System has been reviewed. The fibrous filters (2HVR-FLTA 210A, 2108, 212A and 2128) are adequately installed j
and confined and would not become dislodged following a LOCA. No compensatory actions are required to assure the. functional capability of the ECCS.
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Attachment Response to NRC Bulletin 93-02 Page 2 i
Reouested Actions J
Take prompt action to remove any such material.
Because of. the low probability of a LOCA event, the staff considers removal of this material at the next shutdown, or within 120 days, whichever comes first, to be sufficiently prompt.
If the facility is currently in a shutdown, you are requested to remove such material prior to restart.
BVPS Unit 1 it has been determined by a design review and system walkdown that the Containment Iodine Filtration System HEPA filters (VS-FL-ll and 14) are i
adequately installed and confined and would not be dislodged following a LOCA.
No action or removal is required for these filters.
Since the Containment Iodine i
Filtration System prefilters (VS-FL-10 and 13) were not adequately contained a Design Change Package was implemented for removal of the prefilters (VS-FL-10 and
- 13) prior to the Station entering Mode 4 (Hot Shutdown).
This action is complete.
The review of the Post DBA Hydrogen Control System sample filters (HY-FL-3A, 3B, 30 and 3D) design determined they would not be sprayed on by the quench or recirculation spray.
Since they are in-line filters and would not be dislodged following a LOCA, no action (removal of these filters) is required.
The review of the Containment Instrument Air System filters (IA-FL-5A, 58, 18A and 18B) design determined that since they are in-line filters they would not be t
wetted or dislodged following a LOCA and thus, no action (removal of these filters) is required.
BVPS Unit 2 The review of the Containment Iodine Filtration System pre-filters (2HVR-FLTA210A and 210B) and HEPA filters (2HVR-FLTA212A and 2128) designs determined that these filters are adequately installed and confined and would not be dislodged i
following a LOCA.
No action (removal of these filters) is required.
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Reportino Reouirements 1.
Within 30 days of the date of this bulletin, a written response stating I
whether the actions requested above have been or will be performed.
If the use of such material is identified, this written response shall also include the - locations and quantity of use, any immediate compensatory measures taken, and the current schedule for removal of the material.
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Attachment Response to NRC Bulletin 93-02 Page 3 l
I BVPS Unit 1 BVPS Unit I has removed the fibrous air filters (VS-FL-10 and 13) that could have been dislodged during a LOCA. This action was completed before entering Mode 4 at the end of the 9th refueling outage.
It has been identified that other fibrous air filters (VS-FL-ll and 14; HY-FL-3A, 3B, 3C and 3D and IA-FL-5A, 58, 18A and 188) are located in primary containment and it has been determined, by review of the designs of the systems, that these fibrous air filters will not be dislodged during a LOCA. No compensatory actions are required to address their presence in primary containment.
No temporary sources of fibrous material have been identified as installed or stored in primary containment. The removal of temporary sources of fibrous material from primary containment is adequately addressed in the existing procedures for containment walkdown and closecut prior to a startup and no further action is required to address temporary fibrous material.
The quantity and location of the fibrous air filters in primary containment is indicated below:
Name and Mark No.
Location Quantity 3
Size (in.)
Vol(ft )
Containment Iodine Filtration System Pre-filters (VS-FL-10 and 13)
El.692'-ll" 24x24x12 8
total
- each HEPA Filters (VS-FL-ll and 14)
El.692'-ll" 24x24xll.5 7.6 total each Post DBA Hydrogen Control System Containment Dome Sample Filters El.720'-6" 5DIAx18
.4 total (HY-FL-3A and 3C) each Przr. Cubicle Sample Filters E1.720'-6" 5DIAx18
.4 total (AY-FL-3B and 30) each 2
l Containment Instrument Air System Compressor Filters (IA-FL-5A and 5B)
El.692'-ll" 100.0.x7.51.D.
.1 total x2.75 each i
Air Filters (IA-FL-18A and 188)
El.692'-II" 4DIAx17.25
.25 total each i
- Have been removed.
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~Attachme'nt Response to NRC Bulletin 93-02 1
Page 4 l
BVPS Unit 2 It has been identified that the Containment Iodine Filtration System pre-filters and HEPA filters (2HVR-FLTA210A, 2108, 212A and 212B) are the only fibrous air filters in primary containment.
A review of the design of the system has determined these filters will not be dislodged during a LOCA. No compensatory action is needed to address their presence in primary containment. No temporary sources of fibrous material have been identified as installed or stored in primary containment.
The rtmoval of temporary sources of fibrous material from primary containment is adequately addressed in the existing procedures for containment walkdown and close out prior to a startup and no further action is required to address temporary fibrous material.
l The quantity and location of the fibrous air filters in primary containment is indicated below:
e i
Name and Mark No.
Location Quantity 3
Size (in.)
Vol(ft )
i Containment lodine Filtration System Pre-filters (2HVR-FLTA210A E1.692'-11" ll.75x24 7.8 total and 2108) x23.87 each HEPA filters (2HVR-FLTA212A El.692'-11" 24x24x12 8
total I
and 2128) each Renprtina Reauirements
)
2.
Within 30 days of completion of the requested actions, a report confirming j
i completion, BVPS Unit 1 i
All actions required have been completed.
No further action is planned to address this bulletin.
fLVPS Unit 2 All actions required have been completed.
No further action is planned to I
address this notice.
Reportina Reauirements I
3.
If the addressee proposes'not to take the actions requested in this bulletin, provide to the NRC staff, within 30 days of the date of this bulletin, your proposed alternative course of action and a justification for any deviations from the requested actions.
Attachment Response to NRC Bulletin 93-02 Page 5 BVPS Unit 1 Since the fibrous air filters (VS-FL-10 and 13) which could be dislodged during a LOCA have been removed, BVPS Unit I has complied with the actions requested by l
this bulletin. The remaining fibrous air filters in primary containment will not i
be dislodged during a LOCA and need not be removed. No temporary sources of fibrous material were installed or stored in primary containment. All actions are complete.
No alternatives are proposed and no justifications are required.
BVPS Unit 2 The system design has been reviewed and it has been determined that the fibrous air filters (2HVR-FLTA210A, 2108, 212A and 212B) located in primary containment will not be dislodged during a LOCA. No temporary sources of fibrous material were installed or stored in primary containment. All actior.s are complete and no alternatives are proposed and no justifications are required.
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