The Department of Health Northern Ireland have been very helpful and have answered a Freedom of Information Request  asking for what other reports on child abuse they hold other than the Hughes Inquiry Report.
They have answered in 2 sections. The first section is links of interest and second is the reports they hold. This is a shining example to all other authorities and Departments in how to be helpful in answering FOI requests.
The Reports they hold may be accessed by Freedom of Information Requests and this site is recommended for those who wish to do this https://www.whatdotheyknow.com.
The list is probably not the totality of what they hold but is an excellent start. The links are published below and below them are the data given ie the list of Reports held
Section 1 Links of Interest 
I refer to your request under the above legislation for details of reports the department holds on Child Sexual Abuse from 1970 to the present. On further clarification you request details of ‘in depth Reports or Papers commissioned or authored to report on a potential or perceived problem of child sexual abuse in Northern Ireland, or in a childrens home, or in an council/authority area’.In response to your request I have included the link to ‘A Better Future – 50 Years of Child Care in Northern Ireland 1950-2000’, which describes the changes, developments and progress made in relation to child care in Northern Ireland during those decades, and includes the titles of reports and guidance. For your convenience I have attached these titles separately, some of which relate to other parts of the UK.
I have also included links to Reports and guidance which you may find useful, all of which are included on the Department’s website.
‘Co-operating to Safeguard Children 2003’
‘Tackling sexual violence and abuse – A Regional Strategy 2008-2013
The review of HSS in the case of David and Samual Briggs (The Lewis Report) – Report of the Implementation Team June 2004
Protecting Our Children – A Guide for Parents
Safer Organisations – Safer Children
Standards for Child Protection Services
Social Services Inspectorate – Our Children and Young People – Our Shared Responsibility. Inspection of Child Protection Services in Northern Ireland Overview Report 2006
Working Arrangements for the Welfare and Safeguarding of Child Victims of Human Trafficking (February 2011)
Regional Guidance: Police Involvement in Residential Units, Safeguarding of Children Missing from Home and Foster Care (May 2012)
Section 2 Reports Held  by Department of Health, Social Services and Public Safety Northern Ireland
‘Adoption of Children in Northern Ireland. Report of the Children and Young Persons Review Group’, 1982, HMSO.
• Baldwin, S. and Carlisle, J. ‘Social Support for Disabled Children and their Families: A Review of the Literature’, 1994, HMSO.
• Booz, Allen and Hamilton. ‘An Integrated Service: the reorganisation of the Health and Personal Social Services in Northern Ireland’, 1971, HMSO.
• Bowlby, J. ‘Maternal Care and Mental Health’, 1951, World Health Organisation.
• ‘Care and Supervision Provided in Relation to Maria Colwell: Report of the Committee of Enquiry’, 1974, HMSO.
• Caul, B. and Herron, S. ‘A Service for People: Origins and Development of the Personal Social Services of Northern Ireland’, 1992, December Publications.
• CCETSW, ‘Care for Tomorrow’ 1987.
• CCETSW, ‘The Parsloe Report’, 1984.
• Child Welfare Council, ‘Adoption of Children’, 1963, HMSO.
• ‘Children’s Safeguards Review’ (aka The Kent Report), 1997, HMSO.
• Children and Young Persons Review Group, ‘Adoption of Children in Northern Ireland. A Consultative Paper’, 1980, HMSO.
• CPSSA Committee, ‘The Report of the Sub-Committee of Foster Care in Northern Ireland’, 1980, HMSO.
• Daly, E. ‘Mister, are you a Priest? Recollections by Bishop Edward Daly’, 2000, Four Courts.
• DHSS, ‘An Abuse of Trust – The Martin Huston Report’ 1993.
• DHSS, ‘Children Matter: A Review of Residential Child Care Services in Northern Ireland’, 1998.
• DHSS, ‘Code of Practice NI’, 1999.
• DHSS, ‘Co-operating to Protect Children’, 1989.
• DHSS, ‘Fostering in Northern Ireland: Children and their Carers’, 1998.
• DHSS, ‘Our duty to Care – A Guide’, 1995 (revised 1996, 2000).
• DHSS, ‘Quality Living Standards for Services: Children living in family placements’, 1996.
• DHSS, ‘Quality Living: Standards for Services: Children who live away from home’, 1992 (Revised 1996).
• DHSS, ‘Regional Strategy for Health and Personal Social Services 1987/92’.
• DHSS, ‘Regional Strategy for Health and Personal Social Services 1992/97’.
• DHSS, ‘Regional Strategy for Health and Personal Social Services 1997/2002’.
• DHSSPS, ‘Best Practice – Best Care’, 2001.
• DHSSPS, ‘Reforming Professional Social Work Training’, 2000.
• DHSSPS, ‘Safeguarding to Protect Children’ – DHSSPS Guidance 2002.
• Department of Health, ‘Adoption No: Messages from Research’,1999, John Wiley and Sons Ltd.
• Department of Health, ‘Child Protection: Messages from Research’, 1995.
• Department of Health The Pindown Experiences and the Protection of Children: A report of the Staffordshire Child Care Inquiry 1990 1991.
• Department of Health, ‘Valuing People: A New Strategy for Learning Disability for the 21st Century’, 2001.
• Evason, E. Darby, J. & Pearson, M. ‘Social Need and Social Provision in Northern Ireland. Occasional Papers in Social Administration’, 1976, The New University of Ulster.
• Foster Care: A Guide to Practice’, 1976, HMSO London.
• Field, C.M.B. ‘Report on the Children’s Assessment Clinic Belfast City Hospital’, 1982, (Internal Report).
• Hailes, A. ‘Turn on the Light Mummy, I can’t Hear’, 1989, Ulster Institute for the Deaf. Belfast.
• Hill, N. Notes taken from a seminar presentation in South and East Belfast Health and Social Services Trust, 2002.
• ‘Homes and Hostels for Children and Young People’ (aka the Sheridan Report), 1982, HMSO.
• Horsburgh Committee, ‘Report of the Departmental Committee on Adoption Societies and Agencies’, 1937, HMSO.
• James, W.V. ‘The Helping Hand. A History of the Northern Ireland Council for Orthopaedic Development (NICOD)’, 1984.
• Kelly, G. and Coulter, J. ‘The Children (NI) Order 1995: A New Era for Fostering and Adoption Services?’, 1997, Adoption and Fostering Volume 21 Number 3.
• Kirkwood, QC, A. ‘The Leicestershire Inquiry’, 1982, Leicestershire County Council.
• ‘Legislation and Services for Children and Young People in NI: Report of the Children and Young Persons Review Group’ (aka the Black Report),1979, HMSO.
• McVeigh, J. (Unpublished PhD thesis) ‘A History of the Child and Juvenile Migration Schemes to Australia’, 1995, Queens University Belfast.
• Monteith, M. and Cousins, W. ‘Children and Young People with Disabilities in Northern Ireland Part III Report ‘Social Services Developments and the Impact of the Children (NI) Order 1995’’ , 1999, Centre for Child Care Research, Queens University Belfast.
• National Foster Care Association, ‘UNITED KINGDOM National Standards for Foster Care’, 1999.
• NI Assembly, ‘Inquiry into Residential and Secure Accommodation for Children in Northern Ireland’, 2000.
• NI Child Welfare Council, ‘Children in Care’, 1956, HMSO.
• NI Child Welfare Council, ‘Report on the Children and Young Person’s Boarding-Out Regulation’, 1969, HMSO.
• NI Child Welfare Council, ‘The Operation of the Social Services in relation to Child Welfare’, 1960, HMSO.
• NIGALA, ‘Annual Report of the Northern Ireland Guardian ad Litem Agency’, 2001.
• O’Halloran, K. ‘Adoptions in the Two Jurisdictions of Ireland’, 1994, Avebury.
• O’Halloran, K. ‘Adoption Law in Northern Ireland’, 1994, SLS Legal Publications.
• Packman, J. ‘The Child’s Generation’, 1975.
• ‘People like us: The Report of the Review of the Safeguarding of Children’(aka the Utting Report) 1997, HMSO.
• Policy Planning and Research Unit, ‘Disabled Children in Northern Ireland: Services, Transport and Education’, 1995, PPRU.
• Policy Planning and Research Unit, ‘Surveys of Disability. Report 2 – The Prevalence of Disability among Children in Northern Ireland’, 1992, PPRU.
• PSS Training Strategy DHSS (1) 1991-1995: (2) 1995-2000: (3) 2000-2003.
• ‘Report of the Committee of Inquiry into Children’s Homes and Hostels’ (aka the Hughes Report), 1986, HMSO.
• ‘Report of the Care of Children Committee’ (aka The Curtis Report), 1946, Command 6922, HMSO.
• ‘Report of the Committee on Children and Young People’ (aka The Ingleby Report), 1960, Command 1191, HMSO.
• ‘Report of the Younghusband Committee,’ 1959.
• ‘Review of the Criminal Justice System’, 2000, HMSO.
• Rowe, J. ‘Parents, Children and Adoption’, 1966, Routlege & Kegan Paul, London.
• Rowe, J. and Lambert, L. ‘Children who Wait’, 1973, BAAF.
• Rowe, J. et al, ‘The Influence of Section 29’, 1981, Adoption and Fostering.
• Sebba, J. & Sachdev, D. ‘What Works in Inclusive Education?’ 1997, Barnardos.
• Select Committee Report on Protection of Infants 1971.
• Shearer, A. ‘Handicapped Children in Residential Care – A Study of Policy Failure’, 1980, Bedford Square Press, London.
• Social Work Advisory Group, ‘Families Caring for Handicapped Children in Northern Ireland. Lessons from the Family Fund’, 1976, DHSS.
• The Home Office, ‘Report on the Circumstances which led to the boarding out of Denis and Terence O’Neill at Bank Farm’ (aka The Monckton Report), 1945.
• The NI Child Care Strategy (TEA) 1999.
• ‘The Protection and Welfare of the Young and the Treatment of Offenders’, 1946, Government White Paper, HMSO.
• ‘The Report of the Committee on the Protection and Welfare of the Young and the Treatment of Young Offenders’ (aka The Lynn Committee Report), 1938, Command 187, HMSO.
• ‘The Report of the Vice-Regal Commission on Poor Law Reform in Ireland’, 1906, Command 3202, HMSO.
• ‘The Royal Commission on the Poor Laws and Relief of Distress Report (Ireland)’, 1909, Command 4630, HMSO.
• ‘The Residential Task in Child Care: the Report of a Study Group meeting at Castle Priory College’, 1969, RCA.
• The Seebohm Report 1968 – The Report of the Committee on Local Authority and Allied Personal Social Services.
• Titterington, M. ‘New Rights for Children with Special Educational Needs. A Northern Ireland Guide’, 1999, Disability Action.
• Tresiliotis, J. Shireman, J. and Humbleby, M. ‘Adoption Theory,Policy and Practice’, 1997, Cassell.
• Warner Committee, ‘Choosing with Care: The Report of the Committee of Inquiry into the Selection, Development and Management of Staff in Children’s Homes’, 1992, HMSO.
• Waterhouse Tribunal, ‘Report of the Tribunal of Enquiry into the abuse of children in care in the former County Council areas of Gwynedd and Clwyd since 1974: Lost in Care’, 2000, HMSO.
• Williams Committee, ‘Caring for People: staffing Residential Homes – the report of the Committee’, 1967, National Council for Social Services.
• Wilson, Kerr and Boyle. ‘Juvenile Offenders and Reconviction in NI’, NIO.
• Women’s Group on Public Welfare, ‘The Neglected Child and His Family’, 1946.• Younghusband, E. ‘Social Work in Britain’ 1950-1957.
Please note that victims of abuse may be triggered by reading reports. Support may be obtained from the NAPAC website. NAPAC is the National Association for People Abused in Childhood. http://www.napac.org.uk/ has a freephone helpline and gives links to local support groups. Another good site is http://www.havoca.org/HAVOCA_home.htm
Links and References
cathyfox the truth will out