ML070720030
| ML070720030 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 03/12/2007 |
| From: | Martin J NRC/OGC |
| To: | Abramson P, Anthony Baratta, Hawkens E Atomic Safety and Licensing Board Panel |
| J C Martin, NRR/OGC, 301-415-1569 | |
| References | |
| 50-219-LR, ASLBP 06-844-01-LR, RAS 13236 | |
| Download: ML070720030 (15) | |
Text
March 12, 2007 E. Roy Hawkens, Chair Administrative Judge Atomic Safety and Licensing Board Panel U.S. Nuclear Regulatory Commission Mail Stop: T-3F23 Washington, DC 20555-0001 Paul B. Abramson Administrative Judge Atomic Safety and Licensing Board Panel U.S. Nuclear Regulatory Commission Mail Stop: T-3F23 Washington, DC 20555-0001 Anthony J. Baratta Administrative Judge Atomic Safety and Licensing Board Panel U.S. Nuclear Regulatory Commission Mail Stop: T-3F23 Washington, DC 20555-0001 In the Matter of AMERGEN ENERGY COMPANY, LLC (License Renewal for Oyster Creek Nuclear Generating Station)
Docket No. 50-219-LR
Dear Administrative Judges:
Pursuant to 10 C.F.R. §§ 2.1203(c) and 2.336(d), the staff of the Nuclear Regulatory Commission (Staff) herein notifies the Licensing Board and the parties that it has updated the hearing file and disclosures for this proceeding in accordance with the Boards Memorandum and Order of April 19, 2006, and LBP-06-22, 64 NRC 229 (2006). Materials in this supplement may be accessed through the Agencywide Documents Access and Management System (ADAMS). An index containing the ADAMS accession number, date, and title or description of each item in this supplement is appended hereto as Attachment 1. In addition, on or about Monday, March 12, 2007, materials in this supplement will be made available via the Electronic Hearing Docket (EHD), which may be accessed at the following URL:
http://www.nrc.gov/reading-rm/ehd.html/. Materials in Supplement 7 will be contained in a sub-folder entitled, Hearing File Supplement 7 in the Oyster Creek 50-219-LR" folder of the EHD.
The Staff is also updating its deliberative process privilege log at this time, which is appended hereto as Attachment 2. The Staff will preserve and maintain all privileged documents during the pendency of this proceeding. Also attached, are the Affidavit of Donnie J. Ashley, as required by 10 C.F.R. § 2.336(c), and the Declaration of Pao-Tsin Kuo Director of License Renewal, formally invoking the deliberative process privilege.
As requested by the Board, see April 19 Order at 5, the Staff hereby provides notice that there has been no change to the scheduled issuance of the Final Safety Evaluation Report.
Sincerely,
/RA/
Jody C. Martin Counsel for the NRC Staff
Enclosures:
- Hearing File Index - Supplement 7 : Privilege Log - Deliberative Process - Supplement 7 Declaration of Pao-Tsin Kuo Affidavit of Donnie J. Ashley cc:
See attached Service List
Page 1 of 5 ATTACHMENT 1 OYSTER CREEK HEARING FILE AND MANDATORY DISCLOSURES HEARING FILE INDEX Supplement 7 -March 12, 2007 Supp.
No.
Accession Number Document Date Title/Description:
07-01 ML070590715 10/31/1986 GPU Nuclear Corporation, Oyster Creek Nuclear Generating Station Torus Shell Thickness Margin, MPR-953, 10/86.
07-02 ML070590683 12/4/1986 DRF-44201R1, 50.59 Review of Drywell Core Boring and Repair 07-03 ML070600200 12/11/1986 OCIS-328227-003, Rev 0, Installation Specification for Oyster Creek Nuclear Generating Station - Repair of Concrete Floor Removed in Drywell for UT Readings.
07-04 ML070590711 6/10/1988 TDR-854, Revision 1, 04/22/1987; Drywell Sand Bed Region Corrosion Assessment.
07-05 ML070600310 4/11/1991 C-1302-187-5300-016, Rev. 0; OCDW Projected Thickness Using Data Thru 03/03/1991.
07-06 ML070590690 1/28/1993 GPU Internal Memo: Inspection of Drywell Sand Bed Region and Access Holes.
07-07 ML070600397 10/10/2002 SP-1302-52-120, Rev 3, Quality Specification for Inspection and Localized Repair of the Torus and Vent System Coating, Oyster Creek.
07-08 ML070600211 1/17/2003 GE # Index 9-3, Rev. 1; An ASME Section VIII Evaluation of OC Drywell for Without Sand Case Part 1 Stress Analysis, 2/91.
07-09 ML070590653 1/31/2003 An ASME Section VIII Evaluation of OC Drywell for Without Sand Case Part 2 Stability Analysis, Rev. 2.
07-10 ML070600220 2/25/2005 Report 05-0209, Radiation and Design Basis Accident Testing of Thin Film Technologys BIO-DUR 561.
07-11 ML070600421 8/1/2006 W. O. R2088546-01, Recurring Task to Check the Poly Bottles on the Sand Bed Drains.
Supp.
No.
Accession Number Document Date Title/Description:
Page 2 of 5 07-12 ML070600230 8/21/2006 Amergen Fax with Results of 1986 Core Bore Sample Analyses.
07-13 ML070600402 8/28/2006 W. O. R2091019-ACT, Inspect Poly Bottles for Presence of Water.
07-14 ML070600294 9/15/2006 IS-328227-004, Rev 13, Function Requirements for Drywell Containment Vessel Thickness Examinations for Oyster Creek.
07-15 ML070600193 9/21/2006 C-1302-187-5320-024, Revision 1, OC Drywell Ext. UT Evaluation in Sandbed.
07-16 ML070590687 10/15/2006 Pictures of Sand Bed Bay #7.
07-17 ML070600275 10/17/2006 ER-AA-335-004, Revision 2, Maunal Ultrasonic Measurement of Material Thickness and Interfering Conditions.
07-18 ML070600387 10/17/2006 Photos (9) of Water Found in Bay 5 & 17 Trenches.
07-19 ML070600393 10/17/2006 TQ-AA-122, Revision 3; Qualification and Certification of Nondestructive (NDE)
Personnel.
07-20 ML070600423 10/18/2006 Data Sheet 1R21LR-002 Drywell UT 07-21 ML070590691 10/19/2006 AR 00546049 Report, Water Observed Coming Into the Trench in Bay 5 of Drywell.
07-22 ML070600237 10/24/2006 IR 0553792-02, Drywell Structural Integrity Basis from 1R21 Inspections 07-23 ML070600428 10/26/2006 W.O. R2077340 Torus Coating Repair Data Sheets (20) - Oyster Creek.
07-24 ML070600303 10/27/2006 CM ECR A2152754 Eval of Technical Basis for ECR OC-06-00879-001, 10/24/2006; Drywell Floor/Trough/Drainage Inspections and Repairs.
07-25 ML070600599 10/27/2006 Various ARs 03/24/2006 to 10/27/2006 Report.
07-26 ML070600443 10/28/2006 AmerGen QA Review of Underwater Construction Scope 07-27 ML070600427 10/28/2006 Draft Torus Inspection Report & Data Sheets 07-28 ML070600425 10/29/2006 Data Sheets 21R-158 and 21R-154, Drywell Sump VT, Oyster Creek.
Supp.
No.
Accession Number Document Date Title/Description:
Page 3 of 5 07-29 ML070600447 10/31/2006 1R21 Outage - NRC Inspection Question Log Complied By Amergen.
07-30 ML070600240 11/5/2006 IR 553792-03 Torus Structural Integrity Basis from 1R21 Inspections -
07-31 ML070600521 11/6/2006 ECR OC-06-00879-001, 10/24/2006; Drywell Floor/Trough/Drainage Inspections and Repairs.
07-32 ML070590666 11/6/2006 IR 0553792-02, Drywell Structural Integrity Basis from 1R21 Inspections 07-33 ML063490306 12/8/2006 Oyster Creek License Renewal Project, Drywell Monitoring Program, Information for ACRS Subcommittee Reference Material, Volume 3, Calculation.
07-34 ML070600499 1/16/2007 Email of 01/16/2007 Kfarrar Received Request to Join Conference Call Between AmerGen, New Jersey, and NRC Regarding Inspection Issues.
07-35 ML070600504 1/16/2007 Email of 01/16/2007_6:15pm_KFarrarReceived_Request to Join Conference Call Between AmerGen, New Jersey, and NRC Regarding Inspection Issues.
07-36 ML070600512 1/16/2007 Karl Farrar Email of 01/16/2007 Re: Request to Join Conference Call Between AmerGen, New Jersey, and NRC Regarding Inspection Issues.
07-37 ML070600505 1/17/2007 Email of 01/17/2007_8:16am_KFarrarSent_Re:_Request to Join Conference Call Between AmerGen, New Jersey, and NRC Regarding Inspection Issues.
07-38 ML070360108 1/29/2007 2007/01/29-Letter from Annette L. Vietti-Cook to Congressman Jim Saxton responding to his 01/18/07 letter (enclosed) re Oyster Creek Environmental Impact Statement 07-39 ML070650640 1/30/2007 E-MAIL: Fwd: more OC comments from Michael.
07-40 ML070330063 1/30/2007 Information for ACRS Addressing Public Comments from January 18, 2007 ACRS Plant License Renewal Subcommittee Meeting Related to AmerGens Application for Renewed Operating License for Oyster Creek.
Supp.
No.
Accession Number Document Date Title/Description:
Page 4 of 5 07-41 ML070370619 1/31/2007 2007/01/31-Letter from Richard Webster to ACRS urging the committee to recommend that the Safety Evaluation Report for Oyster Creek not be issued until rigorous studies are done that evaluate the current margin with reasonable assurance...
07-42 ML070100234 1/31/2007 NUREG-1437, Vol. 1, Supp. 28, Generic Environmental Impact Statement for License Renewal of Nuclear Plants Supplement 28 Regarding Oyster Creek Nuclear Generating Station Final Report - Main Report.
07-43 ML070100258 1/31/2007 NUREG-1437, Vol. 2, Supp. 28, Generic Environmental Impact Statement for License Renewal of Nuclear Plants Regarding Oyster Creek Nuclear Generating Station.
07-44 ML070440100 2/1/2007 Transcript of 539th ACRS Meeting on February 1, 2007 in Rockville, MD. Pages 1 - 342. With Related Correspondence.
07-45 ML070360233 2/5/2007 02/05/07 Acknowledgement Ltr. To Hon. J. Corzine re the ACRS Meeting on Oyster Creeks License Renewal Application.
07-46 ML070400090 2/6/2007 E-mail: Concurrence Requested for Final Response to Letter from NJ Department of Environmental Protection Concerning Oyster Creek Drywell Corrosion - Expert Review.
07-47 ML070650590 2/7/2007 E-MAIL: Re: ref voice mails.
07-48 ML070190292 2/7/2007 Y020060266 - Relicensing Oyster Creek 07-49 ML070320077 2/7/2007 Y020070033 - State of NJs Decision to Solicit the Assistance of an Outside Expert in the Field of Corrosion to Review the AmerGens Technical Bases for Concluding the Drywell Integrity is Sufficient to Restart the OC Reactor from the Refueling Outage 07-50 ML070430429 2/8/2007 G20070105/LTR-07-0104 - Ltr. William J. Shack, re Report on the Safety Aspects of the License Renewal Application for the Oyster Creek Generating Station.
Supp.
No.
Accession Number Document Date Title/Description:
Page 5 of 5 07-51 ML070430292 2/9/2007 Sandia Letter to Project Manager Oyster Creek License Renewal. Comments on Buckling Limits for the Oyster Creek Drywell.
07-52 ML070520252 2/15/2007 Additional Commitments Related to the Aging Management Program for Oyster Creek Drywell Shell, Associated with AmerGens License Renewal Application.
07-53 ML070660053 2/21/2007 Comment (1) of John Filippelli on Behalf of U.S. Environmental Protection Agency Regarding Renewal of Operating License for Oyster Creek Nuclear Plant.
07-54 ML070600487 2/23/2007 Various IWE Data Sheets 10/19/2006-10/20/2006 07-55 ML070600492 2/23/2007 Various UT Data Sheets 10/18/2006-10/24/2006 07-56 ML070640238 2/26/2007 LTR-07-0145 - Ltr. William Shack re Summary Report - 539th Meeting of the ACRS, February 1-3, 2007 and Other Related Activities of the Committee.
Page 1 of 3 ATTACHMENT 2 OYSTER CREEK HEARING FILE AND MANDATORY DISCLOSURES PRIVILEGE LOG - DELIBERATIVE PROCESS PRIVILEGE Supplement 7 - March 12, 2007 Certain documents otherwise subject to inclusion in the hearing file and mandatory disclosures for this proceeding have been determined by the NRC Staff to contain information subject to withholding from public disclosure as predecisional, deliberative information. Pursuant to 10 C.F.R.
§ 2.336(b)(5), the Staff is providing this log to identify the following documents withheld under the deliberative process privilege.
PDP No.
Accession Number Author Name/
Affiliation:
Title/Description:
Document Date Document Type Addressee /
Addressee Affiliation Comment Page Count DP-07-01 ML070590702 11/03/2006 Slides, Oyster Creek 1R21 Outage Update on Drywell Shell Inspections from Licensee Update Presentation.
11/3/2006 Meeting Briefing Package/H
- andouts, Slides and Viewgraph s
Handwritten notes 16 DP-07-02 ML070600634 Conte R J, NRC/RGN-I/DRS PD Email of 12/08/2006 T.
OHara Received -
Delinquent Information -
Sump Bypassing.
12/8/2006 E-Mail Ferdas M, NRC/RGN-I Discussion of Inspection Results 2
DP-07-03 ML070600609 Kaufman P D,
NRC/RGN-I/DRS/PSB 2
PD Email of 12/11/2006 T.
OHara Received -
Re: Delinquent Information -
Sump Bypassing.
12/11/2006 E-Mail Conte R J, NRC/RGN-I/DRS/EB1 Discussion of Inspection Results 2
PDP No.
Accession Number Author Name/
Affiliation:
Title/Description:
Document Date Document Type Addressee /
Addressee Affiliation Comment Page Count Page 2 of 3 DP-07-04 ML070600616 OHara T L, NRC/RGN-I/DRS/PSB 2
PD Email of 12/22/2006 T.
OHara Received -
Re: OpE Info On Nitric Acid.
12/22/2006 E-Mail Lund L, NRC/NRR Question re Scope of Review 2
DP-07-05 ML070600544 Notes Taken by Marsha Gamberoni on Documents Related to OC Inspection Report 12/31/2006
- Drawing, Inspection
- Report, Meeting
- Agenda, Meeting Briefing Package/H
- andouts, Slides and Viewgraph s
Handwritten notes 21 DP-07-06 ML070290187 Davis J A, NRC/NRR/
ADRO/DLR/
RLRC E-MAIL: (PD)
Code Case N-284 Rev 0.
1/23/2007 E-Mail Norris W E, NRC/RES/DFER R/DDME/FAITB Discussion re ACRS question 2
DP-07-07 ML070570184 Conte R J, NRC/RGN-I/DRS/EB1 E-MAIL: (PD)
Fwd: Response to Oyster Creek Editorial.
1/23/2007 E-Mail Ashley D J, Barber G S, Ferdas M S, Schoppy J G, NRC Question re possible allegation 7
PDP No.
Accession Number Author Name/
Affiliation:
Title/Description:
Document Date Document Type Addressee /
Addressee Affiliation Comment Page Count Page 3 of 3 DP-07-08 ML070290193 Norris W E, NRC/RES/
DFERR/DD ME/FAITB E-MAIL: (PD) re:
Code Case N-284 Rev 0.
1/23/2007 E-Mail Davis J A, NRC/NRR/ADRO
/DLR/RLRC Discussion re ACRS question 2
DP-07-09 ML070570185 Sheehan N A,
NRC/OPA/
RGN-I/FO E-MAIL: (PD) Re:
PORC Report.
1/25/2007 E-Mail Ferdas M S, NRC/RGN-I/DRP Question re possible allegation 2
DP-07-10 ML070570190 Barkley R S,
NRC/RGN-I E-MAIL: (PD)
Fwd: Got Your Fax of the Oyster Creek Issue.
1/30/2007 E-Mail Lamb J G, Sosa B, NRC/EDO/AO Question re possible allegation 5
DP-07-11 ML070570188 Barkley R S,
NRC/RGN-I E-MAIL: (PD)
Fwd: Re: Got Your Fax of the Oyster Creek Issue.
1/30/2007 E-Mail Bellamy R E, Ferdas M S, NRC/RGN-I Question re possible allegation 3
DP-07-12 ML070650600 Ashley D J, NRC/NRR/
ADRO/DLR/
RLRA E-MAIL: (PD) slides ready??.
1/31/2007 E-Mail Samaddar S K, NRC/NRR/ADES/
DE/EGCB Question re ACRS meeting responses 2
March 12, 2007 UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION BEFORE THE ATOMIC SAFETY AND LICENSING BOARD In the Matter of
)
)
AMERGEN ENERGY COMPANY, LLC
)
Docket No. 50-219-LR
)
(License Renewal for Oyster Creek
)
Nuclear Generating Station)
)
DECLARATION OF PAO-TSIN KUO I, Pao-Tsin Kuo, do hereby state as follows:
- 1.
I am employed as the Director of the Division of Licensing Renewal (DLR) in the Nuclear Regulatory Commissions (NRC) Office of Nuclear Reactor Regulation (NRR).
My supervisory responsibilities include oversight of the NRC Staffs review and evaluation of the Oyster Creek Nuclear Generating Station license renewal application.
- 2.
As part of their responsibilities in preparing the hearing file and mandatory disclosures for these proceedings, NRC staff members under my supervision identified several documents as privileged because they contained information concerning the Staffs deliberative process. Those documents are listed in Attachment 2 to the March 12, 2007, submission of Supplement 7 to the Staffs Hearing File.
- 3.
I have personally reviewed the documents identified as privileged in, and have determined, in accordance with the guidance set forth in Management Directive 3.4, that they contain predecisional information concerning the Staffs review of the license renewal application. All documents contain either the Staffs analyses, recommendations, opinions, or evaluations, and may not necessarily reflect the final agency position with respect to the matters discussed therein. Each of the documents comprises part of the deliberative process necessary to the Staffs review of the pending license renewal application.
- 4.
Further, I have determined that disclosure of the documents could result in harm to the agency, in that it would (a) prematurely disclose the preliminary views of individual Staff members and/or the Staff prior to reaching a final agency decision, and could thus create confusion as to the actual policy or views of the NRC Staff; (b) hinder the efficiency of the Staff, in that forced disclosure of its internal discussions on an unresolved issue would tend to chill all future deliberations and would interfere with the Staffs ability to engage in a free exchange of opinions and analyses prior to publishing its final review documents; and (c) imply or suggest incorrectly that the opinions of the Staff members involved in these communications are actually the final decisions of the agency, while no such final decision has yet been made.
- 5.
Accordingly, I formally invoke the deliberative process privilege with respect to each of the documents listed in Attachment 2 to the March 12, 2007, submission of Supplement 7 to the Staffs Hearing File.
- 6.
I declare under penalty of perjury that the foregoing is true and correct to the best of my knowledge, information and belief.
/Original Signed By/
Pao-Tsin Kuo Executed in Rockville, MD this 12th day of March, 2007
UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION BEFORE THE ATOMIC SAFETY AND LICENSING BOARD In the Matter of
)
)
AMERGEN ENERGY COMPANY, LLC
)
Docket No. 50-219-LR
)
(License Renewal for Oyster Creek
)
Nuclear Generating Station)
)
AFFIDAVIT OF DONNIE J. ASHLEY CONCERNING MANDATORY DISCLOSURE REQUIREMENT OF 10 C.F.R. § 2.336(c)
I, Donnie J. Ashley, do hereby state as follows:
1.
I am employed as a Project Manager in the Division of License Renewal in the Nuclear Regulatory Commissions (NRC) Office of Nuclear Reactor Regulation. I serve as a project manager for the Oyster Creek Nuclear Generating Stations license renewal application (LRA). Among other things, I am managing the preparation of the hearing file and mandatory disclosures in connection with the LRA at issue in this proceeding.
2.
I hereby certify that all relevant materials required to be disclosed pursuant to 10 C.F.R. § 2.336 (b) and (c) in the captioned proceeding have been disclosed, and that the disclosures are accurate and complete as of the date of this certification.
3.
I declare under penalty of perjury that the foregoing is true and correct to the best of my knowledge, information and belief.
/Original Signed By/
Donnie J. Ashley Executed in Rockville, MD this 12th day of March, 2007
UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION BEFORE THE ATOMIC SAFETY AND LICENSING BOARD In the Matter of
)
)
AMERGEN ENERGY COMPANY, LLC
)
Docket No. 50-219-LR
)
(Oyster Creek Nuclear Generating Station)
)
CERTIFICATE OF SERVICE I hereby certify that copies of the NRC Staff letter dated March 12, 2007, providing notice of the availability of Supplement 7 to the Hearing File, with attachments, together with the Affidavit of Donnie Ashley and the Declaration of P.T. Kuo in the above-captioned proceeding have been served on the following by electronic mail with copies by deposit in the NRCs internal mail system or, as indicated by an asterisk, by electronic mail, with copies by U.S. mail, first class, this 12th day of March, 2007.
E. Roy Hawkens, Chair Administrative Judge Atomic Safety and Licensing Board Panel Mail Stop: T-3F23 U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 ERH@nrc.gov Anthony J. Baratta Administrative Judge Atomic Safety and Licensing Board Panel Mail Stop: T-3F23 U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 AJB5@nrc.gov Paul B. Abramson Administrative Judge Atomic Safety and Licensing Board Panel Mail Stop: T-3F23 U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 PBA@nrc.gov Office of the Secretary ATTN: Docketing and Service Mail Stop: O-16C1 U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 HEARINGDOCKET@nrc.gov Office of Commission Appellate Adjudication U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 OCAAMail@nrc.gov Debra Wolf Law Clerk Atomic Safety and Licensing Board Mail Stop: T-3F23 U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 DAW1@nrc.gov Lisa P. Jackson, Acting Commissioner*
New Jersey Department of Environmental Protection P.O. Box 402 Trenton, NJ 08625-0402 Lisa.Jackson@dep.state.nj.us Jill Lipoti, Director*
New Jersey Department of Environmental Protection Division of Environmental Safety and Health P.O. Box 424 Trenton, NJ 08625-0424 Jill.Lipoti@dep.state.nj.us Kathryn M. Sutton, Esq.*
Morgan, Lewis & Bockius LLP 1111 Pennsylvania Ave., NW Washington, DC 20004 ksutton@morganlewis.com Ron Zak*
New Jersey Department of Environmental Protection Nuclear Engineering P.O. Box 415 Trenton, NJ 08625-0415 Ron.Zak@dep.state.nj.us Suzanne Leta*
New Jersey Public Interest Research Group 11 N. Willow St.
Trenton, NJ 08608 sleta@njpirg.org Donald Silverman, Esq.*
Morgan, Lewis, & Bockius LLP 1111 Pennsylvania Avenue, NW Washington, DC 20004 dsilverman@morganlewis.com Alex S. Polonsky, Esq.*
Morgan, Lewis & Bockius LLP 1111 Pennsylvania Ave., N.W.
Washington, DC 20004 apolonsky@morganlewis.com Paul Gunter, Director*
Reactor Watchdog Project Nuclear Information And Resource Service 1424 16th Street, NW, Suite 404 Washington, DC 20036 pgunter@nirs.org J. Bradley Fewell, Esq.*
Exelon Corporation 4300 Warrenville Road Warrenville, IL 60555 bradley.fewell@exeloncorp.com John A. Covino, Esq.*
Valerie Anne Gray, Esq.
Deputy Attorneys General Division of Law Environmental Permitting and Counseling Section Hughes Justice Complex P.O. Box 093 Trenton, NJ 08625 john.covino@dol.lps.state.nj.us Valerie.Gray@dol.lps.state.nj.us Richard Webster, Esq.*
Rutgers Environmental Law Clinic 123 Washington Street Newark, NJ 07102-5695 rwebster@kinoy.rutgers.edu
/RA/
Jody C. Martin Counsel for the NRC Staff